Massachusetts Route 121

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Route 121 marker Route 121 marker

Route 121
Route information
Length: 5.4 mi[1][2] (8.7 km)
Existed: 1960s – present
Major junctions
South end: Route 114 in Cumberland, RI
North end: Route 1A in Wrentham, MA
Counties: RI: Providence, MA: Norfolk
Highway system
Route 120 RI Route 121 Route 122
Route 120 MA Route 121 Route 122
Route 10 RI Route 11 Route 12
Route 10 MA Route 11 Route 12
Route 138A RI Route 143 Route 146

Route 121 is a numbered State Highway running 1.0 mile (1.6 km) in Rhode Island and 4.4 miles (7.1 km) in Massachusetts. It is part of the route connecting the city of Woonsocket (via Route 114) with the town of Wrentham.

Route description[edit]

Route 121 goes through a rural part of northeast Cumberland.


The route from Woonsocket to Wrentham was assigned as Route 142 in the early 1920s when the New England states began numbering their state highways. Route 142 ran for about 11 miles (18 km) between Route 122 and current Route 1A (then designated as U.S. Route 1).[3] It used present-day Route 114 from Route 122 in Woonsocket and Cumberland, then along present-day Route 121 to Wrentham.

MA Route 11.svg
Rhode Island 11.svg

Around 1933, the entire route (in both Rhode Island and Massachusetts) was renumbered as Route 11 and its northern end extended into Dedham along old Route 1 (current Route 1A) when Route 1 was realigned.[4] Route 11 was later cut back to its original length after a few years when Route 1A was designated in the area.

In the mid-1960s, the southern end of the route was truncated by about 5.4 miles (8.7 km) to its current southern terminus at the intersection of Pine Swamp Road and Diamond Hill Road in Cumberland. This was due to the westward extension of the Route 114 designation into the city of Woonsocket.[5] At the same time, the route was renumbered to Route 121.

Major intersections[edit]

State County Location mi[1][2] km Destinations Notes
Rhode Island Providence Cumberland 0.0 0.0 Route 114 (Pine Swamp Road) Southern terminus
RIMA border 1.0
Rhode IslandMassachusetts state line
Massachusetts Norfolk Wrentham 3.6 5.8 I‑495 No access between Route 121 and I-495.
4.4 7.1 Route 1A – Wrentham, Norwood, Plainville Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
  •       Closed/former


  1. ^ a b Google (December 30, 2013). "Route 121 in Rhode Island" (Map). Google Maps. Google. Retrieved December 30, 2013. 
  2. ^ a b Google (December 30, 2013). "Route 121 in Massachusetts" (Map). Google Maps. Google. Retrieved December 30, 2013. 
  3. ^ ALA Greenbook, 1930 edition, Scarborough Motor Guide Co.
  4. ^ MA Route 11
  5. ^ Shawn De Cesari's Rhode Island Route Log

Route map: Bing / Google