diff --git a/homeassistant/helpers/selector.py b/homeassistant/helpers/selector.py
index c996fcaf524..61ac81b0bca 100644
--- a/homeassistant/helpers/selector.py
+++ b/homeassistant/helpers/selector.py
@@ -1137,6 +1137,7 @@ class TextSelectorConfig(TypedDict, total=False):
     """Class to represent a text selector config."""
 
     multiline: bool
+    prefix: str
     suffix: str
     type: TextSelectorType
     autocomplete: str
@@ -1169,6 +1170,7 @@ class TextSelector(Selector[TextSelectorConfig]):
     CONFIG_SCHEMA = vol.Schema(
         {
             vol.Optional("multiline", default=False): bool,
+            vol.Optional("prefix"): str,
             vol.Optional("suffix"): str,
             # The "type" controls the input field in the browser, the resulting
             # data can be any string so we don't validate it.
diff --git a/tests/helpers/test_selector.py b/tests/helpers/test_selector.py
index 09cf79116a0..10dc825372f 100644
--- a/tests/helpers/test_selector.py
+++ b/tests/helpers/test_selector.py
@@ -581,6 +581,7 @@ def test_object_selector_schema(schema, valid_selections, invalid_selections) ->
         ({}, ("abc123",), (None,)),
         ({"multiline": True}, (), ()),
         ({"multiline": False, "type": "email"}, (), ()),
+        ({"prefix": "before", "suffix": "after"}, (), ()),
     ),
 )
 def test_text_selector_schema(schema, valid_selections, invalid_selections) -> None: