diff --git a/API.md b/API.md
index d8bb72a..5e29149 100644
--- a/API.md
+++ b/API.md
@@ -2,19 +2,19 @@
 
 ## Available geometry classes
 
-* `Point(float $latitude, float $longitude, int|Srid $srid = 0)` - [MySQL Point](https://dev.mysql.com/doc/refman/8.0/en/gis-class-point.html)
-* `MultiPoint(Point[] | Collection<Point> $geometries, int|Srid $srid = 0)` - [MySQL MultiPoint](https://dev.mysql.com/doc/refman/8.0/en/gis-class-multipoint.html)
-* `LineString(Point[] | Collection<Point> $geometries, int|Srid $srid = 0)` - [MySQL LineString](https://dev.mysql.com/doc/refman/8.0/en/gis-class-linestring.html)
-* `MultiLineString(LineString[] | Collection<LineString> $geometries, int|Srid $srid = 0)` - [MySQL MultiLineString](https://dev.mysql.com/doc/refman/8.0/en/gis-class-multilinestring.html)
-* `Polygon(LineString[] | Collection<LineString> $geometries, int|Srid $srid = 0)` - [MySQL Polygon](https://dev.mysql.com/doc/refman/8.0/en/gis-class-polygon.html)
-* `MultiPolygon(Polygon[] | Collection<Polygon> $geometries, int|Srid $srid = 0)` - [MySQL MultiPolygon](https://dev.mysql.com/doc/refman/8.0/en/gis-class-multipolygon.html)
-* `GeometryCollection(Geometry[] | Collection<Geometry> $geometries, int|Srid $srid = 0)` - [MySQL GeometryCollection](https://dev.mysql.com/doc/refman/8.0/en/gis-class-geometrycollection.html)
+* `Point(float $latitude, float $longitude, int|Srid|null $srid = null)` - [MySQL Point](https://dev.mysql.com/doc/refman/8.0/en/gis-class-point.html)
+* `MultiPoint(Point[] | Collection<Point> $geometries, int|Srid|null $srid = null)` - [MySQL MultiPoint](https://dev.mysql.com/doc/refman/8.0/en/gis-class-multipoint.html)
+* `LineString(Point[] | Collection<Point> $geometries, int|Srid|null $srid = null)` - [MySQL LineString](https://dev.mysql.com/doc/refman/8.0/en/gis-class-linestring.html)
+* `MultiLineString(LineString[] | Collection<LineString> $geometries, int|Srid|null $srid = null)` - [MySQL MultiLineString](https://dev.mysql.com/doc/refman/8.0/en/gis-class-multilinestring.html)
+* `Polygon(LineString[] | Collection<LineString> $geometries, int|Srid|null $srid = null)` - [MySQL Polygon](https://dev.mysql.com/doc/refman/8.0/en/gis-class-polygon.html)
+* `MultiPolygon(Polygon[] | Collection<Polygon> $geometries, int|Srid|null $srid = null)` - [MySQL MultiPolygon](https://dev.mysql.com/doc/refman/8.0/en/gis-class-multipolygon.html)
+* `GeometryCollection(Geometry[] | Collection<Geometry> $geometries, int|Srid|null $srid = null)` - [MySQL GeometryCollection](https://dev.mysql.com/doc/refman/8.0/en/gis-class-geometrycollection.html)
 
 Geometry classes can be also created by these static methods:
 
-* `fromArray(array $geometry, int|Srid $srid = 0)` - Creates a geometry object from a [GeoJSON](https://en.wikipedia.org/wiki/GeoJSON) array.
-* `fromJson(string $geoJson, int|Srid $srid = 0)` - Creates a geometry object from a [GeoJSON](https://en.wikipedia.org/wiki/GeoJSON) string.
-* `fromWkt(string $wkt, int|Srid $srid = 0)` - Creates a geometry object from a [WKT](https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry).
+* `fromArray(array $geometry, int|Srid|null $srid = null)` - Creates a geometry object from a [GeoJSON](https://en.wikipedia.org/wiki/GeoJSON) array.
+* `fromJson(string $geoJson, int|Srid|null $srid = null)` - Creates a geometry object from a [GeoJSON](https://en.wikipedia.org/wiki/GeoJSON) string.
+* `fromWkt(string $wkt, int|Srid|null $srid = null)` - Creates a geometry object from a [WKT](https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry).
 * `fromWkb(string $wkb)` - Creates a geometry object from a [WKB](https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry#Well-known_binary).
 
 ## Available geometry class methods
diff --git a/README.md b/README.md
index 1655894..0ac9a46 100644
--- a/README.md
+++ b/README.md
@@ -256,6 +256,25 @@ $place = Place::create([
 echo $place->coordinates->toCustomArray(); // ['longitude' => -0.1217424, 'latitude' => 51.5032973]
 ```
 
+## Set default SRID
+
+By default, the SRID is set to 0 (EPSG:0).
+You can set the default SRID for your application by setting the `SRID` constant in a service provider's `boot` method:
+
+```php
+use MatanYadaev\EloquentSpatial\Enums\Srid;
+use Illuminate\Support\ServiceProvider;
+
+class AppServiceProvider extends ServiceProvider
+{
+    public function boot(): void
+    {
+        // Set the default SRID to WGS84 (EPSG:4326)
+        EloquentSpatial::setDefaultSrid(Srid::WGS84);
+    }
+}
+```
+
 ## Development
 
 Here are some useful commands for development:
diff --git a/src/EloquentSpatial.php b/src/EloquentSpatial.php
index 39995ee..9a0ebaa 100644
--- a/src/EloquentSpatial.php
+++ b/src/EloquentSpatial.php
@@ -4,6 +4,7 @@
 
 namespace MatanYadaev\EloquentSpatial;
 
+use MatanYadaev\EloquentSpatial\Enums\Srid;
 use MatanYadaev\EloquentSpatial\Objects\GeometryCollection;
 use MatanYadaev\EloquentSpatial\Objects\LineString;
 use MatanYadaev\EloquentSpatial\Objects\MultiLineString;
@@ -35,6 +36,8 @@ class EloquentSpatial
     /** @var class-string<Polygon> */
     public static string $polygon = Polygon::class;
 
+    public static int $defaultSrid = 0;
+
     /**
      * @param  class-string<GeometryCollection>  $class
      */
@@ -104,4 +107,9 @@ public static function usePolygon(string $class): string
 
         return static::$polygon;
     }
+
+    public static function setDefaultSrid(Srid|int $srid): void
+    {
+        static::$defaultSrid = $srid instanceof Srid ? $srid->value : $srid;
+    }
 }
diff --git a/src/Helper.php b/src/Helper.php
new file mode 100644
index 0000000..fe1c880
--- /dev/null
+++ b/src/Helper.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MatanYadaev\EloquentSpatial;
+
+use MatanYadaev\EloquentSpatial\Enums\Srid;
+
+class Helper
+{
+    public static function getSrid(Srid|int|null $srid = null): int
+    {
+        if ($srid instanceof Srid) {
+            return $srid->value;
+        }
+
+        if (is_int($srid)) {
+            return $srid;
+        }
+
+        return EloquentSpatial::$defaultSrid;
+    }
+}
diff --git a/src/Objects/Geometry.php b/src/Objects/Geometry.php
index d7ef0e7..7cae616 100644
--- a/src/Objects/Geometry.php
+++ b/src/Objects/Geometry.php
@@ -21,6 +21,7 @@
 use MatanYadaev\EloquentSpatial\Factory;
 use MatanYadaev\EloquentSpatial\GeometryCast;
 use MatanYadaev\EloquentSpatial\GeometryExpression;
+use MatanYadaev\EloquentSpatial\Helper;
 use Stringable;
 use WKB as geoPHPWkb;
 
@@ -28,7 +29,7 @@ abstract class Geometry implements Arrayable, Castable, Jsonable, JsonSerializab
 {
     use Macroable;
 
-    public int $srid = 0;
+    public int $srid;
 
     abstract public function toWkt(): string;
 
@@ -90,10 +91,10 @@ public static function fromWkb(string $wkb): static
     /**
      * @throws InvalidArgumentException
      */
-    public static function fromWkt(string $wkt, int|Srid $srid = 0): static
+    public static function fromWkt(string $wkt, int|Srid|null $srid = null): static
     {
         $geometry = Factory::parse($wkt);
-        $geometry->srid = $srid instanceof Srid ? $srid->value : $srid;
+        $geometry->srid = Helper::getSrid($srid);
 
         if (! ($geometry instanceof static)) {
             throw new InvalidArgumentException(
@@ -107,10 +108,10 @@ public static function fromWkt(string $wkt, int|Srid $srid = 0): static
     /**
      * @throws InvalidArgumentException
      */
-    public static function fromJson(string $geoJson, int|Srid $srid = 0): static
+    public static function fromJson(string $geoJson, int|Srid|null $srid = null): static
     {
         $geometry = Factory::parse($geoJson);
-        $geometry->srid = $srid instanceof Srid ? $srid->value : $srid;
+        $geometry->srid = Helper::getSrid($srid);
 
         if (! ($geometry instanceof static)) {
             throw new InvalidArgumentException(
@@ -126,7 +127,7 @@ public static function fromJson(string $geoJson, int|Srid $srid = 0): static
      *
      * @throws JsonException
      */
-    public static function fromArray(array $geometry, int|Srid $srid = 0): static
+    public static function fromArray(array $geometry, int|Srid|null $srid = null): static
     {
         $geoJson = json_encode($geometry, JSON_THROW_ON_ERROR);
 
diff --git a/src/Objects/GeometryCollection.php b/src/Objects/GeometryCollection.php
index 13b339b..6e6a42e 100644
--- a/src/Objects/GeometryCollection.php
+++ b/src/Objects/GeometryCollection.php
@@ -9,6 +9,7 @@
 use Illuminate\Support\Str;
 use InvalidArgumentException;
 use MatanYadaev\EloquentSpatial\Enums\Srid;
+use MatanYadaev\EloquentSpatial\Helper;
 
 class GeometryCollection extends Geometry implements ArrayAccess
 {
@@ -24,14 +25,14 @@ class GeometryCollection extends Geometry implements ArrayAccess
      *
      * @throws InvalidArgumentException
      */
-    public function __construct(Collection|array $geometries, int|Srid $srid = 0)
+    public function __construct(Collection|array $geometries, int|Srid|null $srid = null)
     {
         if (is_array($geometries)) {
             $geometries = collect($geometries);
         }
 
         $this->geometries = $geometries;
-        $this->srid = $srid instanceof Srid ? $srid->value : $srid;
+        $this->srid = Helper::getSrid($srid);
 
         $this->validateGeometriesType();
         $this->validateGeometriesCount();
diff --git a/src/Objects/MultiLineString.php b/src/Objects/MultiLineString.php
index 1a370d9..7cce57d 100644
--- a/src/Objects/MultiLineString.php
+++ b/src/Objects/MultiLineString.php
@@ -26,10 +26,10 @@ class MultiLineString extends GeometryCollection
      *
      * @throws InvalidArgumentException
      */
-    public function __construct(Collection|array $geometries, int|Srid $srid = 0)
+    public function __construct(Collection|array $geometries, int|Srid|null $srid = null)
     {
         // @phpstan-ignore-next-line
-        parent::__construct($geometries, $this->srid = $srid instanceof Srid ? $srid->value : $srid);
+        parent::__construct($geometries, $srid);
     }
 
     public function toWkt(): string
diff --git a/src/Objects/MultiPolygon.php b/src/Objects/MultiPolygon.php
index 2a1f40a..0e29c27 100644
--- a/src/Objects/MultiPolygon.php
+++ b/src/Objects/MultiPolygon.php
@@ -26,10 +26,10 @@ class MultiPolygon extends GeometryCollection
      *
      * @throws InvalidArgumentException
      */
-    public function __construct(Collection|array $geometries, int|Srid $srid = 0)
+    public function __construct(Collection|array $geometries, int|Srid|null $srid = null)
     {
         // @phpstan-ignore-next-line
-        parent::__construct($geometries, $this->srid = $srid instanceof Srid ? $srid->value : $srid);
+        parent::__construct($geometries, $srid);
     }
 
     public function toWkt(): string
diff --git a/src/Objects/Point.php b/src/Objects/Point.php
index 187e633..a3abf65 100644
--- a/src/Objects/Point.php
+++ b/src/Objects/Point.php
@@ -5,6 +5,7 @@
 namespace MatanYadaev\EloquentSpatial\Objects;
 
 use MatanYadaev\EloquentSpatial\Enums\Srid;
+use MatanYadaev\EloquentSpatial\Helper;
 
 class Point extends Geometry
 {
@@ -12,11 +13,11 @@ class Point extends Geometry
 
     public float $longitude;
 
-    public function __construct(float $latitude, float $longitude, int|Srid $srid = 0)
+    public function __construct(float $latitude, float $longitude, int|Srid|null $srid = null)
     {
         $this->latitude = $latitude;
         $this->longitude = $longitude;
-        $this->srid = $srid instanceof Srid ? $srid->value : $srid;
+        $this->srid = Helper::getSrid($srid);
     }
 
     public function toWkt(): string
diff --git a/src/Objects/PointCollection.php b/src/Objects/PointCollection.php
index 345449f..3791938 100644
--- a/src/Objects/PointCollection.php
+++ b/src/Objects/PointCollection.php
@@ -24,9 +24,9 @@ abstract class PointCollection extends GeometryCollection
      *
      * @throws InvalidArgumentException
      */
-    public function __construct(Collection|array $geometries, int|Srid $srid = 0)
+    public function __construct(Collection|array $geometries, int|Srid|null $srid = null)
     {
         // @phpstan-ignore-next-line
-        parent::__construct($geometries, $this->srid = $srid instanceof Srid ? $srid->value : $srid);
+        parent::__construct($geometries, $srid);
     }
 }
diff --git a/tests/Objects/GeometryCollectionTest.php b/tests/Objects/GeometryCollectionTest.php
index 29bc435..30399b6 100644
--- a/tests/Objects/GeometryCollectionTest.php
+++ b/tests/Objects/GeometryCollectionTest.php
@@ -72,7 +72,9 @@
     expect($testPlace->geometry_collection->srid)->toBe(Srid::WGS84->value);
 });
 
-it('creates geometry collection from JSON', function (): void {
+it('creates geometry collection with default 0 SRID from JSON', function (): void {
+    // Arrange
+    EloquentSpatial::setDefaultSrid(0);
     $geometryCollection = new GeometryCollection([
         new Polygon([
             new LineString([
@@ -86,9 +88,39 @@
         new Point(0, 180),
     ]);
 
+    // Act
     $geometryCollectionFromJson = GeometryCollection::fromJson('{"type":"GeometryCollection","geometries":[{"type":"Polygon","coordinates":[[[180,0],[179,1],[178,2],[177,3],[180,0]]]},{"type":"Point","coordinates":[180,0]}]}');
 
+    // Assert
     expect($geometryCollectionFromJson)->toEqual($geometryCollection);
+    expect($geometryCollectionFromJson->srid)->toBe(0);
+});
+
+it('creates geometry collection with default 4326 SRID from JSON', function (): void {
+    // Arrange
+    EloquentSpatial::setDefaultSrid(Srid::WGS84);
+    $geometryCollection = new GeometryCollection([
+        new Polygon([
+            new LineString([
+                new Point(0, 180),
+                new Point(1, 179),
+                new Point(2, 178),
+                new Point(3, 177),
+                new Point(0, 180),
+            ]),
+        ]),
+        new Point(0, 180),
+    ]);
+
+    // Act
+    $geometryCollectionFromJson = GeometryCollection::fromJson('{"type":"GeometryCollection","geometries":[{"type":"Polygon","coordinates":[[[180,0],[179,1],[178,2],[177,3],[180,0]]]},{"type":"Point","coordinates":[180,0]}]}');
+
+    // Assert
+    expect($geometryCollectionFromJson->toWkt())->toBe($geometryCollection->toWkt());
+    expect($geometryCollectionFromJson->srid)->toBe(Srid::WGS84->value);
+
+    // Cleanup
+    EloquentSpatial::setDefaultSrid(0);
 });
 
 it('creates geometry collection with SRID from JSON', function (): void {
@@ -110,7 +142,9 @@
     expect($geometryCollectionFromJson)->toEqual($geometryCollection);
 });
 
-it('creates geometry collection from array', function (): void {
+it('creates geometry collection with default 0 SRID from array', function (): void {
+    // Arrange
+    EloquentSpatial::setDefaultSrid(0);
     $geometryCollection = new GeometryCollection([
         new Polygon([
             new LineString([
@@ -124,9 +158,39 @@
         new Point(0, 180),
     ]);
 
+    // Act
     $geometryCollectionFromJson = GeometryCollection::fromArray(json_decode('{"type":"GeometryCollection","geometries":[{"type":"Polygon","coordinates":[[[180,0],[179,1],[178,2],[177,3],[180,0]]]},{"type":"Point","coordinates":[180,0]}]}', true));
 
+    // Assert
     expect($geometryCollectionFromJson)->toEqual($geometryCollection);
+    expect($geometryCollectionFromJson->srid)->toBe(0);
+});
+
+it('creates geometry collection with default 4326 SRID from array', function (): void {
+    // Arrange
+    EloquentSpatial::setDefaultSrid(Srid::WGS84);
+    $geometryCollection = new GeometryCollection([
+        new Polygon([
+            new LineString([
+                new Point(0, 180),
+                new Point(1, 179),
+                new Point(2, 178),
+                new Point(3, 177),
+                new Point(0, 180),
+            ]),
+        ]),
+        new Point(0, 180),
+    ]);
+
+    // Act
+    $geometryCollectionFromJson = GeometryCollection::fromArray(json_decode('{"type":"GeometryCollection","geometries":[{"type":"Polygon","coordinates":[[[180,0],[179,1],[178,2],[177,3],[180,0]]]},{"type":"Point","coordinates":[180,0]}]}', true));
+
+    // Assert
+    expect($geometryCollectionFromJson->toWkt())->toBe($geometryCollection->toWkt());
+    expect($geometryCollectionFromJson->srid)->toBe(Srid::WGS84->value);
+
+    // Cleanup
+    EloquentSpatial::setDefaultSrid(0);
 });
 
 it('creates geometry collection with SRID from array', function (): void {
@@ -264,7 +328,9 @@
     expect($featureCollectionJson)->toBe($expectedFeatureCollectionJson);
 });
 
-it('creates geometry collection from WKT', function (): void {
+it('creates geometry collection with default 0 SRID from WKT', function (): void {
+    // Arrange
+    EloquentSpatial::setDefaultSrid(0);
     $geometryCollection = new GeometryCollection([
         new Polygon([
             new LineString([
@@ -278,11 +344,40 @@
         new Point(0, 180),
     ]);
 
+    // Act
     $geometryCollectionFromWkt = GeometryCollection::fromWkt('GEOMETRYCOLLECTION(POLYGON((180 0, 179 1, 178 2, 177 3, 180 0)), POINT(180 0))');
 
+    // Assert
     expect($geometryCollectionFromWkt)->toEqual($geometryCollection);
 });
 
+it('creates geometry collection with default 4326 SRID from WKT', function (): void {
+    // Arrange
+    EloquentSpatial::setDefaultSrid(Srid::WGS84);
+    $geometryCollection = new GeometryCollection([
+        new Polygon([
+            new LineString([
+                new Point(0, 180),
+                new Point(1, 179),
+                new Point(2, 178),
+                new Point(3, 177),
+                new Point(0, 180),
+            ]),
+        ]),
+        new Point(0, 180),
+    ]);
+
+    // Act
+    $geometryCollectionFromWkt = GeometryCollection::fromWkt('GEOMETRYCOLLECTION(POLYGON((180 0, 179 1, 178 2, 177 3, 180 0)), POINT(180 0))');
+
+    // Assert
+    expect($geometryCollectionFromWkt->toWkt())->toBe($geometryCollection->toWkt());
+    expect($geometryCollectionFromWkt->srid)->toBe(Srid::WGS84->value);
+
+    // Cleanup
+    EloquentSpatial::setDefaultSrid(0);
+});
+
 it('creates geometry collection with SRID from WKT', function (): void {
     $geometryCollection = new GeometryCollection([
         new Polygon([
diff --git a/tests/Objects/PointTest.php b/tests/Objects/PointTest.php
index 26f3934..ff002d8 100644
--- a/tests/Objects/PointTest.php
+++ b/tests/Objects/PointTest.php
@@ -36,12 +36,33 @@
     expect($testPlace->point->srid)->toBe(Srid::WGS84->value);
 });
 
-it('creates point from JSON', function (): void {
+it('creates point with default 0 SRID from JSON', function (): void {
+    // Arrange
+    EloquentSpatial::setDefaultSrid(0);
+    $point = new Point(0, 180);
+
+    // Act
+    $pointFromJson = Point::fromJson('{"type":"Point","coordinates":[180,0]}');
+
+    // Assert
+    expect($pointFromJson)->toEqual($point);
+    expect($pointFromJson->srid)->toBe(0);
+});
+
+it('creates point with default 4326 SRID from JSON', function (): void {
+    // Arrange
+    EloquentSpatial::setDefaultSrid(Srid::WGS84);
     $point = new Point(0, 180);
 
+    // Act
     $pointFromJson = Point::fromJson('{"type":"Point","coordinates":[180,0]}');
 
+    // Assert
     expect($pointFromJson)->toEqual($point);
+    expect($pointFromJson->srid)->toBe(Srid::WGS84->value);
+
+    // Cleanup
+    EloquentSpatial::setDefaultSrid(0);
 });
 
 it('creates point with SRID from JSON', function (): void {
@@ -52,12 +73,33 @@
     expect($pointFromJson)->toEqual($point);
 });
 
-it('creates point from array', function (): void {
+it('creates point with default 0 SRID from array', function (): void {
+    // Arrange
+    EloquentSpatial::setDefaultSrid(0);
+    $point = new Point(0, 180);
+
+    // Act
+    $pointFromJson = Point::fromArray(['type' => 'Point', 'coordinates' => [180, 0]]);
+
+    // Assert
+    expect($pointFromJson)->toEqual($point);
+    expect($pointFromJson->srid)->toBe(0);
+});
+
+it('creates point with default 4326 SRID from array', function (): void {
+    // Arrange
+    EloquentSpatial::setDefaultSrid(Srid::WGS84);
     $point = new Point(0, 180);
 
+    // Act
     $pointFromJson = Point::fromArray(['type' => 'Point', 'coordinates' => [180, 0]]);
 
+    // Assert
     expect($pointFromJson)->toEqual($point);
+    expect($pointFromJson->srid)->toBe(Srid::WGS84->value);
+
+    // Cleanup
+    EloquentSpatial::setDefaultSrid(0);
 });
 
 it('creates point with SRID from array', function (): void {
@@ -83,12 +125,31 @@
     })->toThrow(InvalidArgumentException::class);
 });
 
-it('creates point from WKT', function (): void {
+it('creates point with default 0 SRID from WKT', function (): void {
+    // Arrange
+    EloquentSpatial::setDefaultSrid(0);
+    $point = new Point(0, 180);
+
+    $pointFromWkt = Point::fromWkt('POINT(180 0)');
+
+    expect($pointFromWkt)->toEqual($point);
+    expect($pointFromWkt->srid)->toBe(0);
+});
+
+it('creates point with default 4326 SRID from WKT', function (): void {
+    // Arrange
+    EloquentSpatial::setDefaultSrid(Srid::WGS84);
     $point = new Point(0, 180);
 
+    // Act
     $pointFromWkt = Point::fromWkt('POINT(180 0)');
 
+    // Assert
     expect($pointFromWkt)->toEqual($point);
+    expect($pointFromWkt->srid)->toBe(Srid::WGS84->value);
+
+    // Cleanup
+    EloquentSpatial::setDefaultSrid(0);
 });
 
 it('creates point with SRID from WKT', function (): void {