diff --git a/bigquery/bigquery.go b/bigquery/bigquery.go
index 0a32f02c3d52..8029d303cf5c 100644
--- a/bigquery/bigquery.go
+++ b/bigquery/bigquery.go
@@ -82,6 +82,11 @@ func (c *Client) Close() error {
 	return nil
 }
 
+// ProjectID returns the client's ProjectID.
+func (c *Client) ProjectID() string {
+	return c.projectID
+}
+
 // Calls the Jobs.Insert RPC and returns a Job.
 func (c *Client) insertJob(ctx context.Context, job *bq.Job, media io.Reader) (*Job, error) {
 	call := c.bqs.Jobs.Insert(c.projectID, job).Context(ctx)
diff --git a/bigquery/job.go b/bigquery/job.go
index 1e08e899c519..1a8bb70011d4 100644
--- a/bigquery/job.go
+++ b/bigquery/job.go
@@ -68,6 +68,11 @@ func (j *Job) ID() string {
 	return j.jobID
 }
 
+// ProjectID returns the job's ProjectID.
+func (j *Job) ProjectID() string {
+	return j.projectID
+}
+
 // Location returns the job's location.
 func (j *Job) Location() string {
 	return j.location