diff --git a/pydantic/fields.py b/pydantic/fields.py
index 94a2ce7..482d14e 100644
--- a/pydantic/fields.py
+++ b/pydantic/fields.py
@@ -1,4 +1,4 @@
-from collections import defaultdict, deque
+from collections import Counter, defaultdict, deque
 from collections.abc import Hashable as CollectionsHashable, Iterable as CollectionsIterable
 from typing import (
     TYPE_CHECKING,
@@ -292,6 +292,7 @@ SHAPE_GENERIC = 10
 SHAPE_DEQUE = 11
 SHAPE_DICT = 12
 SHAPE_DEFAULTDICT = 13
+SHAPE_COUNTER = 14
 SHAPE_NAME_LOOKUP = {
     SHAPE_LIST: 'List[{}]',
     SHAPE_SET: 'Set[{}]',
@@ -302,9 +303,10 @@ SHAPE_NAME_LOOKUP = {
     SHAPE_DEQUE: 'Deque[{}]',
     SHAPE_DICT: 'Dict[{}]',
     SHAPE_DEFAULTDICT: 'DefaultDict[{}]',
+    SHAPE_COUNTER: 'Counter[{}]',
 }
 
-MAPPING_LIKE_SHAPES: Set[int] = {SHAPE_DEFAULTDICT, SHAPE_DICT, SHAPE_MAPPING}
+MAPPING_LIKE_SHAPES: Set[int] = {SHAPE_DEFAULTDICT, SHAPE_DICT, SHAPE_MAPPING, SHAPE_COUNTER}
 
 
 class ModelField(Representation):
@@ -630,6 +632,10 @@ class ModelField(Representation):
             self.key_field = self._create_sub_type(get_args(self.type_)[0], 'key_' + self.name, for_keys=True)
             self.type_ = get_args(self.type_)[1]
             self.shape = SHAPE_DEFAULTDICT
+        elif issubclass(origin, Counter):
+            self.key_field = self._create_sub_type(get_args(self.type_)[0], 'key_' + self.name, for_keys=True)
+            self.type_ = int
+            self.shape = SHAPE_COUNTER
         elif issubclass(origin, Dict):
             self.key_field = self._create_sub_type(get_args(self.type_)[0], 'key_' + self.name, for_keys=True)
             self.type_ = get_args(self.type_)[1]