diff --git a/CHANGELOG b/CHANGELOG
index 7bb473f3..586dbc4e 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -21,6 +21,7 @@ v2.3.0
 * Feat: Add `Bdf\Prime\Mapper\Attribute\DiscriminatorMap` attribute to define the discriminator map on single table inheritance in replacement of overriding properties `discriminatorColumn` and `discriminatorMap` of the mapper
 * Feat: Add `Bdf\Prime\Mapper\Mapper::setDiscriminatorMap()`
 * Change: Mapper's configurators attributes now handle inheritance (i.e. attributes declared on parent class are inherited by child classes)
+* Change: Allow iterable criteria and closure filters on `EntityRepository::count()` and `EntityRelation::count()`
 
 BC Breaks
 * Deprecated: Returning `false` on callback of `EntityRepository::transaction()` to rollback the transaction is deprecated. Use exception instead.
diff --git a/src/Entity/Model.php b/src/Entity/Model.php
index d7356dcc..fbbf90d7 100755
--- a/src/Entity/Model.php
+++ b/src/Entity/Model.php
@@ -53,7 +53,7 @@
  * @psalm-method static EntityQuery filter(\Closure $filter)
  *
  * @method static int updateBy(array $attributes, array $criteria = [])
- * @method static int count(array $criteria = [], $attributes = null)
+ * @method static int count(iterable|callable $criteria = [], $attributes = null)
  * @method static bool exists(self $entity)
  * @method static static|null refresh(self $entity)
  */
diff --git a/src/Relations/EntityRelation.php b/src/Relations/EntityRelation.php
index a21a8478..a40545b9 100755
--- a/src/Relations/EntityRelation.php
+++ b/src/Relations/EntityRelation.php
@@ -4,6 +4,7 @@
 
 use Bdf\Prime\Connection\ConnectionInterface;
 use Bdf\Prime\Exception\PrimeException;
+use Bdf\Prime\Query\Contract\Aggregatable;
 use Bdf\Prime\Query\Contract\ReadOperation;
 use Bdf\Prime\Query\Contract\WriteOperation;
 use Bdf\Prime\Query\Custom\KeyValue\KeyValueQuery;
@@ -16,6 +17,7 @@
 use ReflectionClass;
 use ReflectionException;
 
+use function assert;
 use function sprintf;
 
 /**
@@ -39,7 +41,6 @@
  * @psalm-method R findByIdOrNew(mixed|array $pk) Get one entity by its primary key or instantiate a new one, using where clause criteria if not found in repository
  * @psalm-method R firstOrFail() Get the first result of the query, or throws an exception if no result
  * @psalm-method R firstOrNew(bool $useCriteriaAsDefault = true) Get the first result of the query, or create a new instance if no result. If $useCriteriaAsDefault is true, the where criteria will be used as default values for the new instance.
- * @psalm-method int count()
  *
  * @mixin ReadCommandInterface<\Bdf\Prime\Connection\ConnectionInterface, R>
  * @psalm-no-seal-methods
@@ -257,6 +258,31 @@ public function query(?string $queryClass = null): ReadCommandInterface
         return $this->relation->link($this->owner, $queryClass);
     }
 
+    /**
+     * Count number of related entities matching the criteria
+     *
+     * Usage:
+     * ```php
+     * $entity->relation('relation')->count(); // Count all entities
+     * $entity->relation('relation')->count(['status' => 'active']); // Count with criteria
+     * $entity->relation('relation')->count(fn ($query) => $query->where('status', 'active')->where('age', '>', 18)); // Count with callback
+     * ```
+     *
+     * @param iterable<string,mixed>|callable(QueryInterface):void $criteria The filtering criteria. If not set, will count all entities of the repository
+     * @param string|array|null $attributes The attribute(s) to count. If null, will count all (COUNT(*))
+     *
+     * @return int
+     * @throws PrimeException
+     */
+    #[ReadOperation]
+    public function count($criteria = [], $attributes = null): int
+    {
+        $query = $this->query()->where($criteria);
+        assert($query instanceof Aggregatable);
+
+        return $query->count($attributes);
+    }
+
     /**
      * Save the relation from an entity
      *
diff --git a/src/Repository/EntityRepository.php b/src/Repository/EntityRepository.php
index b37adf20..57e571f7 100755
--- a/src/Repository/EntityRepository.php
+++ b/src/Repository/EntityRepository.php
@@ -16,6 +16,7 @@
 use Bdf\Prime\Exception\PrimeException;
 use Bdf\Prime\Mapper\Mapper;
 use Bdf\Prime\Mapper\Metadata;
+use Bdf\Prime\Query\Contract\Aggregatable;
 use Bdf\Prime\Query\Contract\ReadOperation;
 use Bdf\Prime\Query\Contract\WriteOperation;
 use Bdf\Prime\Query\Custom\KeyValue\KeyValueQuery;
@@ -50,6 +51,7 @@
 use Doctrine\DBAL\Connection;
 use Exception;
 
+use function assert;
 use function method_exists;
 use function trigger_error;
 
@@ -576,19 +578,28 @@ public function writer(): WriterInterface
     }
 
     /**
-     * Count entity
+     * Count number of entities matching the criteria
      *
-     * @param array $criteria
-     * @param string|array|null $attributes
+     * Usage:
+     * ```php
+     * MyEntity::repository()->count(); // Count all entities
+     * MyEntity::repository()->count(['status' => 'active']); // Count with criteria
+     * MyEntity::repository()->count(fn ($query) => $query->where('status', 'active')->where('age', '>', 18)); // Count with callback
+     * ```
+     *
+     * @param iterable<string,mixed>|callable(QueryInterface):void $criteria The filtering criteria. If not set, will count all entities of the repository
+     * @param string|array|null $attributes The attribute(s) to count. If null, will count all (COUNT(*))
      *
      * @return int
      * @throws PrimeException
      */
     #[ReadOperation]
-    public function count(array $criteria = [], $attributes = null): int
+    public function count($criteria = [], $attributes = null): int
     {
-        /** @psalm-suppress UndefinedInterfaceMethod */
-        return $this->builder()->where($criteria)->count($attributes);
+        $query = $this->queries->builder()->where($criteria);
+        assert($query instanceof Aggregatable);
+
+        return $query->count($attributes);
     }
 
     /**
diff --git a/src/Repository/RepositoryInterface.php b/src/Repository/RepositoryInterface.php
index f3a685b5..20f752fc 100644
--- a/src/Repository/RepositoryInterface.php
+++ b/src/Repository/RepositoryInterface.php
@@ -189,11 +189,12 @@ public function writer(): WriterInterface;
     /**
      * Count entity
      *
-     * @param array $criteria
+     * @param array<string, mixed> $criteria
      * @param string|array|null $attributes
      *
      * @return int
      * @throws PrimeException
+     * @todo Update signature in prime 3.0 to match EntityRepository::count()
      */
     #[ReadOperation]
     public function count(array $criteria = [], $attributes = null): int;
diff --git a/tests/Relations/FunctionnalTest.php b/tests/Relations/FunctionnalTest.php
index b50263b8..09b7b077 100755
--- a/tests/Relations/FunctionnalTest.php
+++ b/tests/Relations/FunctionnalTest.php
@@ -18,6 +18,7 @@
 use Bdf\Prime\Pack;
 use Bdf\Prime\CustomerPack;
 use Bdf\Prime\Project;
+use Bdf\Prime\Query\Expression\Attribute;
 use Bdf\Prime\Test\TestPack;
 use Bdf\Prime\TestFile;
 use Bdf\Prime\User;
@@ -357,6 +358,41 @@ public function test_eager_relation_constraints()
         );
     }
 
+    /**
+     *
+     */
+    public function test_count_on_entity_relation()
+    {
+        TestPack::pack()->nonPersist([
+            'project' => $project = new Project([
+                'id' => 1,
+                'name' => 'Projet 1'
+            ]),
+            'company' => new Company([
+                'id' => 1,
+                'name' => 'Société 1'
+            ])
+        ])
+        ->nonPersist([
+            'developer' => new Developer([
+                'id' => 1,
+                'name' => 'Dév 1',
+                'project' => TestPack::pack()->get('project'),
+                'company' => $this->getTestPack()->get('company')
+            ]),
+            'leadDeveloper' => new Developer([
+                'id' => 2,
+                'name' => 'Dév 2',
+                'lead' => true,
+                'project' => TestPack::pack()->get('project'),
+                'company' => $this->getTestPack()->get('company')
+            ]),
+        ]);
+
+        $this->assertSame(2, $project->relation('developers')->count());
+        $this->assertSame(1, $project->relation('developers')->count(['lead' => true]));
+    }
+
     /**
      *
      */
diff --git a/tests/Repository/EntityRepositoryTest.php b/tests/Repository/EntityRepositoryTest.php
index 3f81dad4..959cee38 100755
--- a/tests/Repository/EntityRepositoryTest.php
+++ b/tests/Repository/EntityRepositoryTest.php
@@ -15,6 +15,7 @@
 use Bdf\Prime\Prime;
 use Bdf\Prime\PrimeTestCase;
 use Bdf\Prime\Query\Custom\KeyValue\KeyValueQuery;
+use Bdf\Prime\Query\Expression\Like;
 use Bdf\Prime\Query\Query;
 use Bdf\Prime\Relations\Exceptions\RelationNotFoundException;
 use Bdf\Prime\Repository\Event\AfterLoad;
@@ -140,6 +141,7 @@ public function test_count()
 
         $this->assertEquals(2, Prime::repository('Bdf\Prime\TestEntity')->count());
         $this->assertEquals(1, Prime::repository('Bdf\Prime\TestEntity')->count(['name :like' => '%2']));
+        $this->assertEquals(1, Prime::repository('Bdf\Prime\TestEntity')->count(fn (Query $query) => $query->where('name', (new Like(2))->endsWith())));
     }
 
     /**
diff --git a/tests/StaticAnalysis/Query.php b/tests/StaticAnalysis/Query.php
index 22457b9e..5a1fe693 100644
--- a/tests/StaticAnalysis/Query.php
+++ b/tests/StaticAnalysis/Query.php
@@ -138,6 +138,8 @@ public function utilityMethods(): void
     {
         $this->checkInt(Person::count());
         $this->checkInt(Person::repository()->count());
+        $this->checkInt(Person::repository()->count(['firstName' => 'John']));
+        $this->checkInt(Person::repository()->count(fn(QueryInterface $query) => $query->where('firstName', 'John')));
         $this->checkInt(Person::updateBy(['firstName' => 'XXX'], ['firstName' => 'John']));
         $this->checkInt(Person::repository()->updateBy(['firstName' => 'XXX'], ['firstName' => 'John']));
         $this->checkBool(Person::exists(new Person()));
@@ -167,6 +169,8 @@ public function test_relation(): void
         $this->checkAddressCollection($relation->by('zipCode')->all());
         $this->checkAddress($relation->create());
         $this->checkInt($relation->count());
+        $this->checkInt($relation->count(['zipCode' => '84660']));
+        $this->checkInt($relation->count(fn(QueryInterface $query) => $query->where('zipCode', '84660')));
     }
 
     public function test_relation_with_class(): void