diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd2f32da6..0e5927821 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Support year/month shorthand date notations in temporal extent arguments of `Connection.load_collection`, `DataCube.filter_temporal` and related ([#421](https://github.com/Open-EO/openeo-python-client/issues/421))
 - Support parameterized `bands` in `load_collection` ([#471](https://github.com/Open-EO/openeo-python-client/issues/471))
 - Allow specifying item schema in `Parameter.array()`
+- Support "subtype" and "format" schema options in `Parameter.string()`
 
 ### Changed
 
diff --git a/openeo/api/process.py b/openeo/api/process.py
index 2d2a25f00..fc9265458 100644
--- a/openeo/api/process.py
+++ b/openeo/api/process.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 import warnings
-from typing import Union, Optional
+from typing import Union, Optional, List
 
 
 class Parameter:
@@ -61,14 +61,25 @@ def datacube(cls, name: str = "data", description: str = "A data cube.") -> Para
         return cls(name=name, description=description, schema={"type": "object", "subtype": "datacube"})
 
     @classmethod
-    def string(cls, name: str, description: str = None, default=_DEFAULT_UNDEFINED, values=None) -> Parameter:
+    def string(
+        cls,
+        name: str,
+        description: str = None,
+        default=_DEFAULT_UNDEFINED,
+        values: Optional[List[str]] = None,
+        subtype: Optional[str] = None,
+        format: Optional[str] = None,
+    ) -> Parameter:
         """Helper to create a 'string' type parameter."""
         schema = {"type": "string"}
         if values is not None:
             schema["enum"] = values
+        if subtype:
+            schema["subtype"] = subtype
+        if format:
+            schema["format"] = format
         return cls(name=name, description=description, schema=schema, default=default)
 
-
     @classmethod
     def integer(cls, name: str, description: str = None, default=_DEFAULT_UNDEFINED) -> Parameter:
         """Helper to create a 'integer' type parameter."""
diff --git a/tests/api/test_process.py b/tests/api/test_process.py
index 98f5f9f68..3d90e06cd 100644
--- a/tests/api/test_process.py
+++ b/tests/api/test_process.py
@@ -61,6 +61,22 @@ def test_parameter_string():
     }
 
 
+def test_parameter_string_subtype():
+    assert Parameter.string("cid", subtype="collection-id").to_dict() == {
+        "name": "cid",
+        "description": "cid",
+        "schema": {"type": "string", "subtype": "collection-id"},
+    }
+
+
+def test_parameter_string_format():
+    assert Parameter.string("date", subtype="date", format="date").to_dict() == {
+        "name": "date",
+        "description": "date",
+        "schema": {"type": "string", "subtype": "date", "format": "date"},
+    }
+
+
 def test_parameter_integer():
     assert Parameter.integer("iterations").to_dict() == {
         "name": "iterations", "description": "iterations", "schema": {"type": "integer"}