diff --git a/src/anthropic/lib/bedrock/_client.py b/src/anthropic/lib/bedrock/_client.py
index cda0690d..c2ba5e3c 100644
--- a/src/anthropic/lib/bedrock/_client.py
+++ b/src/anthropic/lib/bedrock/_client.py
@@ -67,7 +67,7 @@ def _prepare_options(input_options: FinalRequestOptions) -> FinalRequestOptions:
     return options
 
 
-def _infer_region() -> str:
+def _infer_region(aws_profile: str | None = None) -> str:
     """
     Infer the AWS region from the environment variables or
     from the boto3 session if available.
@@ -77,7 +77,7 @@ def _infer_region() -> str:
         try:
             import boto3
 
-            session = boto3.Session()
+            session = boto3.Session(profile_name=aws_profile)
             if session.region_name:
                 aws_region = session.region_name
         except ImportError:
@@ -178,7 +178,7 @@ def __init__(
 
         self.aws_access_key = aws_access_key
 
-        self.aws_region = _infer_region() if aws_region is None else aws_region
+        self.aws_region = _infer_region(aws_profile) if aws_region is None else aws_region
         self.aws_profile = aws_profile
 
         self.aws_session_token = aws_session_token
@@ -343,7 +343,7 @@ def __init__(
 
         self.aws_access_key = aws_access_key
 
-        self.aws_region = _infer_region() if aws_region is None else aws_region
+        self.aws_region = _infer_region(aws_profile) if aws_region is None else aws_region
         self.aws_profile = aws_profile
 
         self.aws_session_token = aws_session_token