As of the 2010 United States Census , the CDP 's population was 4,428 .
Until the 2000 Census , Barclay was included as part of the Barclay - Kingston CDP .
As of the 2010 United States Census , the Barclay - Kingston CDP 's population was 4,428 .
Until the 2000 Census , Barclay was included as part of the Barclay - Kingston CDP .