diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe3abc5a6e..330e1173e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,7 @@ The types of changes are:
 - Added erasure support to the Recurly integration [#4891](https://github.com/ethyca/fides/pull/4891)
 - Added UI for configuring integrations for detection/discovery [#4922](https://github.com/ethyca/fides/pull/4922)
 - Request overrides for opt-in and opt-out consent requests [#4920](https://github.com/ethyca/fides/pull/4920)
+- Added query_param_key to Privacy Center schema [#4939](https://github.com/ethyca/fides/pull/4939)
 
 ### Changed
 - Set default ports for local development of client projects (:3001 for privacy center and :3000 for admin-ui) [#4912](https://github.com/ethyca/fides/pull/4912)
diff --git a/src/fides/api/schemas/privacy_center_config.py b/src/fides/api/schemas/privacy_center_config.py
index 962df307f0..0777e59c62 100644
--- a/src/fides/api/schemas/privacy_center_config.py
+++ b/src/fides/api/schemas/privacy_center_config.py
@@ -41,11 +41,18 @@ class CustomPrivacyRequestField(FidesSchema):
     required: Optional[bool] = True
     default_value: Optional[str] = None
     hidden: Optional[bool] = False
+    query_param_key: Optional[str] = None
 
     @root_validator
     def validate_default_value(cls, values: Dict[str, Any]) -> Dict[str, Any]:
-        if values.get("hidden") and values.get("default_value") is None:
-            raise ValueError("default_value is required when hidden is True")
+        if (
+            values.get("hidden")
+            and values.get("default_value") is None
+            and values.get("query_param_key") is None
+        ):
+            raise ValueError(
+                "default_value or query_param_key are required when hidden is True"
+            )
         return values
 
 
diff --git a/tests/ops/schemas/test_privacy_center_config.py b/tests/ops/schemas/test_privacy_center_config.py
index c23e4b37af..b36c59b488 100644
--- a/tests/ops/schemas/test_privacy_center_config.py
+++ b/tests/ops/schemas/test_privacy_center_config.py
@@ -25,10 +25,18 @@ def privacy_center_config(self) -> PrivacyCenterConfig:
     def test_valid_custom_privacy_request_field(self):
         CustomPrivacyRequestField(label="Tenant ID", default_value="123", hidden=True)
 
+    def test_valid_custom_privacy_request_field_with_query_param(self):
+        CustomPrivacyRequestField(
+            label="Tenant ID", query_param_key="site_id", hidden=True
+        )
+
     def test_custom_privacy_request_field_with_missing_default_value(self):
         with pytest.raises(ValidationError) as exc:
             CustomPrivacyRequestField(label="Tenant ID", hidden=True)
-        assert "default_value is required when hidden is True" in str(exc.value)
+        assert (
+            "default_value or query_param_key are required when hidden is True"
+            in str(exc.value)
+        )
 
     def test_custom_privacy_request_fields_with_missing_values(self):
         with pytest.raises(ValidationError):