diff --git a/src/Sites/Site.php b/src/Sites/Site.php
index 9e81178e7b1..75d4c777311 100644
--- a/src/Sites/Site.php
+++ b/src/Sites/Site.php
@@ -16,12 +16,14 @@ class Site implements Augmentable
     protected $handle;
     protected $config;
     protected $rawConfig;
+    protected $isDefault;
 
-    public function __construct($handle, $config)
+    public function __construct($handle, $config, $isDefault = false)
     {
         $this->handle = $handle;
         $this->config = $this->resolveAntlers($config);
         $this->rawConfig = $config;
+        $this->isDefault = $isDefault;
     }
 
     public function handle()
@@ -95,6 +97,11 @@ public function relativePath($url)
         return $path === '' ? '/' : $path;
     }
 
+    public function isDefault()
+    {
+        return $this->isDefault;
+    }
+
     public function set($key, $value)
     {
         $this->config[$key] = $this->resolveAntlersValue($value);
diff --git a/src/Sites/Sites.php b/src/Sites/Sites.php
index a93277ea66f..855f5786d5c 100644
--- a/src/Sites/Sites.php
+++ b/src/Sites/Sites.php
@@ -268,7 +268,9 @@ public function config(): array
 
     protected function hydrateConfig($config): Collection
     {
-        return collect($config)->map(fn ($site, $handle) => new Site($handle, $site));
+        $defaultSiteHandle = collect($config)->keys()->first();
+
+        return collect($config)->map(fn ($site, $handle) => new Site($handle, $site, $handle === $defaultSiteHandle));
     }
 
     protected function getNewSites(): Collection
diff --git a/tests/Sites/SiteTest.php b/tests/Sites/SiteTest.php
index a420833d49d..9dcdfe64aba 100644
--- a/tests/Sites/SiteTest.php
+++ b/tests/Sites/SiteTest.php
@@ -59,6 +59,16 @@ public function gets_lang()
         $this->assertEquals('en-US', (new Site('en', ['locale' => 'en-US', 'lang' => 'en-US']))->lang());
     }
 
+    #[Test]
+    public function gets_is_default()
+    {
+        $withoutDefault = new Site('en', ['locale' => 'en_US']);
+        $withDefault = new Site('en', ['locale' => 'en_US'], true);
+
+        $this->assertFalse($withoutDefault->isDefault());
+        $this->assertTrue($withDefault->isDefault());
+    }
+
     #[Test]
     public function gets_url_when_given_a_trailing_slash()
     {
diff --git a/tests/Sites/SitesConfigTest.php b/tests/Sites/SitesConfigTest.php
index 27317f2440a..5419d31a2ad 100644
--- a/tests/Sites/SitesConfigTest.php
+++ b/tests/Sites/SitesConfigTest.php
@@ -54,12 +54,14 @@ public function it_gets_sites_from_yaml()
         $this->assertSame('/', Site::default()->url());
         $this->assertSame('en_US', Site::default()->locale());
         $this->assertSame('en', Site::default()->lang());
+        $this->assertTrue(Site::default()->isDefault());
 
         $this->assertSame('french', Site::get('french')->handle());
         $this->assertSame('French', Site::get('french')->name());
         $this->assertSame('/fr', Site::get('french')->url());
         $this->assertSame('fr_FR', Site::get('french')->locale());
         $this->assertSame('fr', Site::get('french')->lang());
+        $this->assertFalse(Site::get('french')->isDefault());
     }
 
     #[Test]
@@ -78,6 +80,7 @@ public function it_gets_default_site_without_yaml()
         $this->assertSame('/', Site::default()->url());
         $this->assertSame(config('app.locale'), Site::default()->locale());
         $this->assertSame(config('app.locale'), Site::default()->lang());
+        $this->assertTrue(Site::default()->isDefault());
     }
 
     #[Test]