diff --git a/Spanner/src/Database.php b/Spanner/src/Database.php
index 57c035cfc9e3..69b2e13a6177 100644
--- a/Spanner/src/Database.php
+++ b/Spanner/src/Database.php
@@ -122,6 +122,7 @@ class Database
     const TYPE_PG_NUMERIC = 'pgNumeric';
     const TYPE_PG_JSONB = 'pgJsonb';
     const TYPE_JSON = TypeCode::JSON;
+    const TYPE_PG_OID = 'pgOid';
 
     /**
      * @var ConnectionInterface
diff --git a/Spanner/src/PgOid.php b/Spanner/src/PgOid.php
new file mode 100644
index 000000000000..8a3d0b9a1ced
--- /dev/null
+++ b/Spanner/src/PgOid.php
@@ -0,0 +1,102 @@
+<?php
+/**
+ * Copyright 2023 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Google\Cloud\Spanner;
+
+use Google\Cloud\Spanner\V1\TypeAnnotationCode;
+
+/**
+ * Represents a value with a data type of
+ * [PG OID](https://cloud.google.com/spanner/docs/reference/postgresql/data-types) for the
+ * Postgres Dialect database.
+ *
+ * Example:
+ * ```
+ * use Google\Cloud\Spanner\SpannerClient;
+ *
+ * $spanner = new SpannerClient();
+ * $pgOid = $spanner->pgOid('123');
+ * ```
+ */
+class PgOid implements ValueInterface, TypeAnnotationInterface
+{
+    /**
+     * @var string|null
+     */
+    private ?string $value;
+
+    /**
+     * @param string|null $value The OID value.
+     */
+    public function __construct(?string $value)
+    {
+        $this->value = $value;
+    }
+
+    /**
+     * Get the underlying value.
+     *
+     * @return string|null
+     */
+    public function get(): ?string
+    {
+        return $this->value;
+    }
+
+    /**
+     * Get the type.
+     *
+     * @access private
+     * @return int
+     */
+    public function type(): int
+    {
+        return ValueMapper::TYPE_INT64;
+    }
+
+    /**
+     * Get the type annotation code.
+     * This is to be used along type, to differentiate the value from TypeCode::INT64.
+     *
+     * @access private
+     * @return int
+     */
+    public function typeAnnotation(): int
+    {
+        return TypeAnnotationCode::PG_OID;
+    }
+
+    /**
+     * Format the value as a string.
+     *
+     * @return string
+     */
+    public function formatAsString(): ?string
+    {
+        return (string) $this->value;
+    }
+
+    /**
+     * Format the value as a string.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return (string) $this->value;
+    }
+}
diff --git a/Spanner/src/SpannerClient.php b/Spanner/src/SpannerClient.php
index 78efabf19312..cb459122df90 100644
--- a/Spanner/src/SpannerClient.php
+++ b/Spanner/src/SpannerClient.php
@@ -823,6 +823,21 @@ public function pgJsonb($value)
         return new PgJsonb($value);
     }
 
+    /**
+     * Represents a value with a data type of
+     * [PG OID](https://cloud.google.com/spanner/docs/reference/postgresql/data-types) for the
+     * Postgres Dialect database.
+     *
+     * Example:
+     * ```
+     * $pgOid = $spanner->pgOid('123');
+     * ```
+     */
+    public function pgOid($value)
+    {
+        return new PgOid($value);
+    }
+
     /**
      * Create an Int64 object. This can be used to work with 64 bit integers as
      * a string value while on a 32 bit platform.
diff --git a/Spanner/src/ValueMapper.php b/Spanner/src/ValueMapper.php
index c54605170b74..57771a434d6e 100644
--- a/Spanner/src/ValueMapper.php
+++ b/Spanner/src/ValueMapper.php
@@ -45,6 +45,7 @@ class ValueMapper
     const TYPE_JSON = TypeCode::JSON;
     const TYPE_PG_NUMERIC = 'pgNumeric';
     const TYPE_PG_JSONB = 'pgJsonb';
+    const TYPE_PG_OID = 'pgOid';
 
     /**
      * @var array
@@ -64,6 +65,7 @@ class ValueMapper
         self::TYPE_JSON,
         self::TYPE_PG_NUMERIC,
         self::TYPE_PG_JSONB,
+        self::TYPE_PG_OID,
         self::TYPE_FLOAT32,
     ];
 
@@ -79,6 +81,7 @@ class ValueMapper
     private static $typeToClassMap = [
         self::TYPE_PG_NUMERIC => PgNumeric::class,
         self::TYPE_PG_JSONB => PgJsonb::class,
+        self::TYPE_PG_OID => PgOid::class,
     ];
 
     /*
@@ -90,6 +93,7 @@ class ValueMapper
     private static $typeCodes = [
         self::TYPE_PG_NUMERIC => self::TYPE_NUMERIC,
         self::TYPE_PG_JSONB => self::TYPE_JSON,
+        self::TYPE_PG_OID => self::TYPE_INT64,
     ];
 
     /*
@@ -101,6 +105,7 @@ class ValueMapper
     private static $typeAnnotations = [
         self::TYPE_PG_NUMERIC => TypeAnnotationCode::PG_NUMERIC,
         self::TYPE_PG_JSONB => TypeAnnotationCode::PG_JSONB,
+        self::TYPE_PG_OID => TypeAnnotationCode::PG_OID,
     ];
 
     /**
@@ -280,9 +285,13 @@ private function decodeValue($value, array $type)
 
         switch ($type['code']) {
             case self::TYPE_INT64:
-                $value = $this->returnInt64AsObject
-                    ? new Int64($value)
-                    : (int) $value;
+                if (isset($type['typeAnnotation']) && $type['typeAnnotation'] === TypeAnnotationCode::PG_OID) {
+                    $value = new PgOid($value);
+                } else {
+                    $value = $this->returnInt64AsObject
+                        ? new Int64($value)
+                        : (int) $value;
+                }
                 break;
 
             case self::TYPE_TIMESTAMP:
diff --git a/Spanner/tests/Snippet/PgOidTest.php b/Spanner/tests/Snippet/PgOidTest.php
new file mode 100644
index 000000000000..7cdf215a3ad5
--- /dev/null
+++ b/Spanner/tests/Snippet/PgOidTest.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ * Copyright 2023 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Google\Cloud\Spanner\Tests\Snippet;
+
+use Google\Cloud\Core\Testing\Snippet\SnippetTestCase;
+use Google\Cloud\Spanner\PgOid;
+
+/**
+ * @group spanner
+ */
+class PgOidTest extends SnippetTestCase
+{
+    public function testClass()
+    {
+        $expected = new PgOid('123');
+        $snippet = $this->snippetFromClass(PgOid::class);
+        $res = $snippet->invoke('pgOid');
+
+        $this->assertInstanceOf(PgOid::class, $res->returnVal());
+        $this->assertEquals($expected, $res->returnVal());
+    }
+}
diff --git a/Spanner/tests/Snippet/SpannerClientTest.php b/Spanner/tests/Snippet/SpannerClientTest.php
index d0f316779e80..564f75698cc1 100644
--- a/Spanner/tests/Snippet/SpannerClientTest.php
+++ b/Spanner/tests/Snippet/SpannerClientTest.php
@@ -39,6 +39,7 @@
 use Google\Cloud\Spanner\Timestamp;
 use Google\Cloud\Spanner\Numeric;
 use Google\Cloud\Spanner\PgNumeric;
+use Google\Cloud\Spanner\PgOid;
 use Google\Cloud\Spanner\PgJsonb;
 use Prophecy\Argument;
 
@@ -261,6 +262,7 @@ public function factoriesProvider()
             [Numeric::class, 'numeric'],
             [PgNumeric::class, 'pgNumeric'],
             [PgJsonB::class, 'pgJsonb'],
+            [PgOid::class, 'pgOid'],
         ];
     }
 
diff --git a/Spanner/tests/System/PgQueryTest.php b/Spanner/tests/System/PgQueryTest.php
index ccea014c7ef7..dd374e517544 100644
--- a/Spanner/tests/System/PgQueryTest.php
+++ b/Spanner/tests/System/PgQueryTest.php
@@ -542,6 +542,36 @@ public function testBindJsonbParameterNull()
         $this->assertCount($currentCount + 1, iterator_to_array($res));
     }
 
+    public function testBindPgOidParameter()
+    {
+        $db = self::$database;
+
+        $res = $db->execute('SELECT $1', [
+            'parameters' => [
+                'p1' => 1,
+            ],
+            'types' => [
+                'p1' => Database::TYPE_PG_OID
+            ]
+        ]);
+        $this->assertCount(1, iterator_to_array($res));
+    }
+
+    public function testBindPgOidParameterNull()
+    {
+        $db = self::$database;
+
+        $res = $db->execute('SELECT $1', [
+            'parameters' => [
+                'p1' => null,
+            ],
+            'types' => [
+                'p1' => Database::TYPE_PG_OID
+            ]
+        ]);
+        $this->assertCount(1, iterator_to_array($res));
+    }
+
     public function arrayTypesProvider()
     {
         return [
@@ -639,7 +669,9 @@ function (array $res) {
 
                     return $res;
                 }
-            ]
+            ],
+            // pg_oid
+            [[5,4,3,2,1]],
         ];
     }
 
@@ -685,6 +717,7 @@ public function arrayTypesEmptyProvider()
             [Database::TYPE_DATE],
             [Database::TYPE_PG_NUMERIC],
             [Database::TYPE_PG_JSONB],
+            [Database::TYPE_PG_OID],
         ];
     }
 
@@ -722,6 +755,7 @@ public function arrayTypesNullProvider()
             [Database::TYPE_DATE],
             [Database::TYPE_PG_NUMERIC],
             [Database::TYPE_PG_JSONB],
+            [Database::TYPE_PG_OID],
         ];
     }
 
diff --git a/Spanner/tests/Unit/ArrayTypeTest.php b/Spanner/tests/Unit/ArrayTypeTest.php
index 91524972c0e7..d04b0f2d7fd2 100644
--- a/Spanner/tests/Unit/ArrayTypeTest.php
+++ b/Spanner/tests/Unit/ArrayTypeTest.php
@@ -46,6 +46,7 @@ public function typesProvider()
             // types (w/ typeAnnotation)
             [Database::TYPE_PG_NUMERIC],
             [Database::TYPE_PG_JSONB],
+            [Database::TYPE_PG_OID],
         ];
     }
 
diff --git a/Spanner/tests/Unit/SpannerClientTest.php b/Spanner/tests/Unit/SpannerClientTest.php
index 3f93170d22f1..beeb17033339 100644
--- a/Spanner/tests/Unit/SpannerClientTest.php
+++ b/Spanner/tests/Unit/SpannerClientTest.php
@@ -33,6 +33,7 @@
 use Google\Cloud\Spanner\Instance;
 use Google\Cloud\Spanner\InstanceConfiguration;
 use Google\Cloud\Spanner\PgJsonb;
+use Google\Cloud\Spanner\PgOid;
 use Google\Cloud\Spanner\KeyRange;
 use Google\Cloud\Spanner\KeySet;
 use Google\Cloud\Spanner\Numeric;
@@ -433,6 +434,12 @@ public function testPgJsonB()
         $this->assertInstanceOf(PgJsonb::class, $objVal);
     }
 
+    public function testPgOid()
+    {
+        $oidVal = $this->client->pgOid('123');
+        $this->assertInstanceOf(PgOid::class, $oidVal);
+    }
+
     public function testInt64()
     {
         $i64 = $this->client->int64('123');
diff --git a/Spanner/tests/Unit/ValueMapperTest.php b/Spanner/tests/Unit/ValueMapperTest.php
index c33e7402904f..9b9780f3a2a0 100644
--- a/Spanner/tests/Unit/ValueMapperTest.php
+++ b/Spanner/tests/Unit/ValueMapperTest.php
@@ -158,6 +158,23 @@ public function testFormatParamsForExecuteSqlJsonB()
         $this->assertEquals(TypeAnnotationCode::PG_JSONB, $res['paramTypes']['json']['typeAnnotation']);
     }
 
+    public function testFormatParamsForExecuteSqlOid()
+    {
+        $val = '123';
+        $params = [
+            'oid' => $val
+        ];
+        $types = [
+            'oid' => Database::TYPE_PG_OID
+        ];
+
+        $res = $this->mapper->formatParamsForExecuteSql($params, $types);
+
+        $this->assertEquals($val, $res['params']['oid']);
+        $this->assertEquals(TypeCode::INT64, $res['paramTypes']['oid']['code']);
+        $this->assertEquals(TypeAnnotationCode::PG_OID, $res['paramTypes']['oid']['typeAnnotation']);
+    }
+
     public function testFormatParamsForExecuteSqlValueInterface()
     {
         $val = 'hello world';
@@ -1035,6 +1052,16 @@ public function testDecodeValuesJsonB()
         $this->assertEquals('{\"rating\":9,\"open\":true}', $res['rowName']);
     }
 
+    public function testDecodeValuesOid()
+    {
+        $res = $this->mapper->decodeValues(
+            $this->createField(Database::TYPE_PG_OID),
+            $this->createRow('123'),
+            Result::RETURN_ASSOCIATIVE
+        );
+        $this->assertEquals('123', $res['rowName']);
+    }
+
     public function testDecodeValuesAnonymousField()
     {
         $fields = [