diff --git a/bigquery/samples/client_query.py b/bigquery/samples/client_query.py
index b2cf0c8637f2..5242c854e220 100644
--- a/bigquery/samples/client_query.py
+++ b/bigquery/samples/client_query.py
@@ -30,10 +30,7 @@ def client_query(client):
         ORDER BY total_people DESC
         LIMIT 20
     """
-    query_job = client.query(
-        query,
-        location="US",  # Must match the source and the destination dataset(s) location.
-    )  # Make an API request.
+    query_job = client.query(query)  # Make an API request.
 
     print("The query data:")
     for row in query_job:
diff --git a/bigquery/samples/client_query_add_column.py b/bigquery/samples/client_query_add_column.py
index c26cbe96622d..e2724eb300b1 100644
--- a/bigquery/samples/client_query_add_column.py
+++ b/bigquery/samples/client_query_add_column.py
@@ -43,7 +43,6 @@ def client_query_add_column(client, table_id):
         # 'age' columns, while the results of this query will contain an
         # additional 'favorite_color' column.
         'SELECT "Timmy" as full_name, 85 as age, "Blue" as favorite_color;',
-        location="US",  # Must match the source and the destination dataset(s) location.
         job_config=job_config,
     )  # Make an API request.
     query_job.result()  # Wait for the job to complete.
diff --git a/bigquery/samples/client_query_batch.py b/bigquery/samples/client_query_batch.py
index 9dab2b70a78e..73ddd4f83ae2 100644
--- a/bigquery/samples/client_query_batch.py
+++ b/bigquery/samples/client_query_batch.py
@@ -32,13 +32,13 @@ def client_query_batch(client):
     """
 
     # Start the query, passing in the extra configuration.
-    query_job = client.query(
-        sql, location="US", job_config=job_config
-    )  # Make an API request.
+    query_job = client.query(sql, job_config=job_config)  # Make an API request.
 
     # Check on the progress by getting the job's updated state. Once the state
     # is `DONE`, the results are ready.
-    query_job = client.get_job(query_job.job_id, location="US")  # Make an API request.
+    query_job = client.get_job(
+        query_job.job_id, location=query_job.location
+    )  # Make an API request.
 
     print("Job {} is currently in state {}".format(query_job.job_id, query_job.state))
     # [END bigquery_query_batch]
diff --git a/bigquery/samples/client_query_destination_table.py b/bigquery/samples/client_query_destination_table.py
index 471667780c41..f40ce3a5afc1 100644
--- a/bigquery/samples/client_query_destination_table.py
+++ b/bigquery/samples/client_query_destination_table.py
@@ -35,11 +35,7 @@ def client_query_destination_table(client, table_id):
     """
 
     # Start the query, passing in the extra configuration.
-    query_job = client.query(
-        sql,
-        location="US",  # Must match the source and the destination dataset(s) location.
-        job_config=job_config,
-    )  # Make an API request.
+    query_job = client.query(sql, job_config=job_config)  # Make an API request.
     query_job.result()  # Wait for the job to complete.
 
     print("Query results loaded to the table {}".format(table_id))
diff --git a/bigquery/samples/client_query_destination_table_cmek.py b/bigquery/samples/client_query_destination_table_cmek.py
index a8749ba35384..06c02038ba7a 100644
--- a/bigquery/samples/client_query_destination_table_cmek.py
+++ b/bigquery/samples/client_query_destination_table_cmek.py
@@ -38,9 +38,7 @@ def client_query_destination_table_cmek(client, table_id, kms_key_name):
 
     # Start the query, passing in the extra configuration.
     query_job = client.query(
-        "SELECT 17 AS my_col;",
-        location="US",  # Must match the source and the destination dataset(s) location.
-        job_config=job_config,
+        "SELECT 17 AS my_col;", job_config=job_config
     )  # Make an API request.
     query_job.result()  # Wait for the job to complete.
 
diff --git a/bigquery/samples/client_query_destination_table_legacy.py b/bigquery/samples/client_query_destination_table_legacy.py
index 7d30c20f1d6f..88c38b79e839 100644
--- a/bigquery/samples/client_query_destination_table_legacy.py
+++ b/bigquery/samples/client_query_destination_table_legacy.py
@@ -40,11 +40,7 @@ def client_query_destination_table_legacy(client, table_id):
     """
 
     # Start the query, passing in the extra configuration.
-    query_job = client.query(
-        sql,
-        location="US",  # Must match the source and the destination dataset(s) location.
-        job_config=job_config,
-    )  # Make an API request.
+    query_job = client.query(sql, job_config=job_config)  # Make an API request.
     query_job.result()  # Wait for the job to complete.
 
     print("Query results loaded to the table {}".format(table_id))
diff --git a/bigquery/samples/client_query_dry_run.py b/bigquery/samples/client_query_dry_run.py
index 4094d5de4dcf..8b6f018a5a90 100644
--- a/bigquery/samples/client_query_dry_run.py
+++ b/bigquery/samples/client_query_dry_run.py
@@ -33,7 +33,6 @@ def client_query_dry_run(client):
             "WHERE state = 'WA' "
             "GROUP BY name"
         ),
-        location="US",  # Must match the source and the destination dataset(s) location.
         job_config=job_config,
     )  # Make an API request.
 
diff --git a/bigquery/samples/client_query_legacy_sql.py b/bigquery/samples/client_query_legacy_sql.py
index 8400a9acc60a..f9e2c69b6ae4 100644
--- a/bigquery/samples/client_query_legacy_sql.py
+++ b/bigquery/samples/client_query_legacy_sql.py
@@ -32,11 +32,7 @@ def client_query_legacy_sql(client):
     job_config.use_legacy_sql = True
 
     # Start the query, passing in the extra configuration.
-    query_job = client.query(
-        query,
-        location="US",  # Must match the source and the destination dataset(s) location.
-        job_config=job_config,
-    )  # Make an API request.
+    query_job = client.query(query, job_config=job_config)  # Make an API request.
 
     print("The query data:")
     for row in query_job:
diff --git a/bigquery/samples/client_query_relax_column.py b/bigquery/samples/client_query_relax_column.py
index 4b3a5080df6c..48c264a16c68 100644
--- a/bigquery/samples/client_query_relax_column.py
+++ b/bigquery/samples/client_query_relax_column.py
@@ -45,7 +45,6 @@ def client_query_relax_column(client, table_id):
         # In this example, the existing table contains 'full_name' and 'age' as
         # required columns, but the query results will omit the second column.
         'SELECT "Beyonce" as full_name;',
-        location="US",  # Must match the source and the destination dataset(s) location.
         job_config=job_config,
     )  # Make an API request.
     query_job.result()  # Wait for the job to complete.
diff --git a/bigquery/samples/copy_table.py b/bigquery/samples/copy_table.py
index 28fb5ceb0cb8..20f6776cf87d 100644
--- a/bigquery/samples/copy_table.py
+++ b/bigquery/samples/copy_table.py
@@ -28,11 +28,7 @@ def copy_table(client, source_table_id, destination_table_id):
     # TODO(developer): Set destination_table_id to the ID of the destination table.
     # destination_table_id = "your-project.destination_dataset.destination_table"
 
-    job = client.copy_table(
-        source_table_id,
-        destination_table_id,
-        location="US",  # Must match the source and the destination dataset(s) location.
-    )
+    job = client.copy_table(source_table_id, destination_table_id)
     job.result()  # Wait for the job to complete.
 
     print("A copy of the table created.")
diff --git a/bigquery/samples/copy_table_cmek.py b/bigquery/samples/copy_table_cmek.py
index 49a98140c6ac..0aa299084d19 100644
--- a/bigquery/samples/copy_table_cmek.py
+++ b/bigquery/samples/copy_table_cmek.py
@@ -36,12 +36,7 @@ def copy_table_cmek(client, dest_table_id, orig_table_id, kms_key_name):
     encryption_config = bigquery.EncryptionConfiguration(kms_key_name=kms_key_name)
     job_config = bigquery.CopyJobConfig()
     job_config.destination_encryption_configuration = encryption_config
-    job = client.copy_table(
-        orig_table_id,
-        dest_table_id,
-        location="US",  # Must match the source and the destination dataset(s) location.
-        job_config=job_config,
-    )
+    job = client.copy_table(orig_table_id, dest_table_id, job_config=job_config)
     job.result()  # Wait for the job to complete.
 
     dest_table = client.get_table(dest_table_id)  # Make an API request.
diff --git a/bigquery/samples/copy_table_multiple_source.py b/bigquery/samples/copy_table_multiple_source.py
index 6f54d592b7ca..532ea0a0ab90 100644
--- a/bigquery/samples/copy_table_multiple_source.py
+++ b/bigquery/samples/copy_table_multiple_source.py
@@ -28,11 +28,7 @@ def copy_table_multiple_source(client, dest_table_id, table_ids):
     # TODO(developer): Set table_ids to the list of the IDs of the original tables.
     # table_ids = ["your-project.your_dataset.your_table_name", ...]
 
-    job = client.copy_table(
-        table_ids,
-        dest_table_id,
-        location="US",  # Must match the source and the destination dataset(s) location.
-    )  # Make an API request.
+    job = client.copy_table(table_ids, dest_table_id)  # Make an API request.
     job.result()  # Wait for the job to complete.
 
     print("The tables {} have been appended to {}".format(table_ids, dest_table_id))
diff --git a/bigquery/samples/load_table_dataframe.py b/bigquery/samples/load_table_dataframe.py
index 7133b0bfbcc1..8cfb34424457 100644
--- a/bigquery/samples/load_table_dataframe.py
+++ b/bigquery/samples/load_table_dataframe.py
@@ -61,10 +61,7 @@ def load_table_dataframe(client, table_id):
     )
 
     job = client.load_table_from_dataframe(
-        dataframe,
-        table_id,
-        job_config=job_config,
-        location="US",  # Must match the source and the destination dataset(s) location.
+        dataframe, table_id, job_config=job_config
     )  # Make an API request.
     job.result()  # Wait for the job to complete.
 
diff --git a/bigquery/samples/tests/test_create_job.py b/bigquery/samples/tests/test_create_job.py
index 5ead51156606..3cda34bf0848 100644
--- a/bigquery/samples/tests/test_create_job.py
+++ b/bigquery/samples/tests/test_create_job.py
@@ -19,6 +19,6 @@
 def test_create_job(capsys, client):
 
     query_job = create_job.create_job(client)
-    client.cancel_job(query_job.job_id, location="US")
+    client.cancel_job(query_job.job_id, location=query_job.location)
     out, err = capsys.readouterr()
     assert "Started job: {}".format(query_job.job_id) in out