Merrimac, Massachusetts is located Northeastern Massachusetts, bordered by Haverhill on the southwest, the state of New Hampshire on the northwest and north, Amesbury on the east, and West Newbury on the south. Merrimac is 37 miles north of Boston; 78 miles south of Portland, Maine; and 254 miles from New York City. Principal highways are Interstate Route 495 and State Route 110. There is no passenger or freight rail service in Merrimac, but the network of intermodal facilities serving Massachusetts is easily accessible.

Some information gathered on Merrimac, MA is courtesy of Commonwealth Communities at Mass.gov