ZIP Code 01803 is within two congressional districts: the 6th US Congressional District of Massachusetts currently represented by Democrat Seth Moulton and the 5th US Congressional District of Massachusetts currently represented by Democrat Katherine Clark.
ZIP Code 01803 is within two Massachusetts State House of Representatives districts: the Massachusetts State House of Representatives District 15th Middlesex currently represented by Democrat Michelle Ciccolo. the Massachusetts State House of Representatives District 21st Middlesex currently represented by . ZIP Code 01803 is completely within Massachusetts State Senate District Second Middlesex and is currently represented by Democrat Patricia D. Jehlen.