Congresswoman Niki Tsongas Share: Congresswoman Niki Tsongas Visit Website 126 John Street, Suite 12 Lowell, MA 01852 (978) 459-0101 Facebook Twitter YouTube Hours: Hours: Mon. ? Fri., 9:00am ? 5:00pm About Rep Info Map About Representing the 3rd Congressional District of Massachusetts Whom to Contact Niki Tsongas What's Nearby? Distance: 5 10 15 20 25 50 mi.