Question: What was the population of the town as of 2010 in Rockingham County through which New Hampshire Route 121 winds through?

Context paragraphs:
New Hampshire Route 121: New Hampshire Route 121 (abbreviated NH 121) is a 22.555 mi north–south state highway in Rockingham and Hillsborough counties in southeastern New Hampshire.  The road winds through the communities of Atkinson, Hampstead, Sandown, Derry, Chester, and Auburn.  The southern terminus of NH 121 is at the Massachusetts state line in Plaistow, where the road, named Atkinson Depot Road, continues into the city of Haverhill as an unnumbered local road (North Main Street) leading to Route 125.  The northern terminus is at a traffic circle, where NH 121 meets New Hampshire Route 28 Bypass (the Londonderry Turnpike) in eastern Manchester.  At this point, the road is known as Manchester Road.

Newfields, New Hampshire: Newfields is a town in Rockingham County, New Hampshire, United States.  The population was 1,680 at the 2010 census.  The primary village in town, where 301 people resided at the 2010 census, is defined as the Newfields census-designated place (CDP), and is located along New Hampshire Route 85 and the Squamscott River.  It is a quaint village of handsome old houses.

Chester, New Hampshire: Chester is a town in Rockingham County, New Hampshire, United States.  The population was 4,768 at the 2010 census.  It was home to the now defunct Chester College (formerly White Pines College).

Vermont Route 121: Vermont Route 121 (VT 121) is a state highway in the U.S. state of Vermont.  The highway runs 21.439 mi from VT 11 in Londonderry east to U.S. Route 5 (US 5) in the incorporated village of Bellows Falls in the town of Rockingham.  VT 121 follows the Saxtons River in northern Windham County.  The highway has a pair of gravel sections in the towns of Windham and Grafton.

New Hampshire Route 153: New Hampshire Route 153 is a 50.566 mi secondary north–south highway in Strafford and Carroll counties in eastern New Hampshire.  The southern terminus is in Farmington at New Hampshire Route 11.  The northern terminus is in Conway village (town of Conway) at New Hampshire Route 16 and New Hampshire Route 113.

New Hampshire Route 84: New Hampshire Route 84 is a 4.184 mi secondary east–west state highway in Rockingham County in southeastern New Hampshire.  The eastern terminus of NH 84 is in Hampton Falls at U.S. Route 1.  The western terminus is in Kensington at New Hampshire Route 150.

New Hampshire Route 87: New Hampshire Route 87 is a 6.317 mi east–west highway in Rockingham County in southeastern New Hampshire connecting Newfields to Epping.  The eastern terminus of NH 87 is in Newfields at its junction with New Hampshire Route 85.  The western terminus is in Epping at its junction with New Hampshire Route 125.

New Hampshire Route 108: New Hampshire Route 108 is a 42.430 mi north–south state highway in Rockingham and Strafford counties in southeastern New Hampshire.  The southern terminus of NH 108 is at the Massachusetts state line in Plaistow.  The northern terminus is at an intersection with New Hampshire Route 125 and New Hampshire Route 202A in downtown Rochester.

New Hampshire Route 202A: New Hampshire Route 202A (abbreviated NH 202A) is a 14.639 mi east–west state highway in Strafford and Rockingham counties in southeastern New Hampshire.  The western terminus is in Northwood at U.S. Route 202 and New Hampshire 9, near their intersection with U.S. Route 4.  Its eastern terminus is in downtown Rochester at New Hampshire Route 108 and New Hampshire Route 125.

New Hampshire Route 97: New Hampshire Route 97 (abbreviated NH 97) is a 2.563 mi east–west state highway in Salem, Rockingham County, New Hampshire.  The western terminus of the route is in the center of Salem at New Hampshire Route 28 (Broadway).  The eastern terminus is at the Massachusetts state line, where the road continues east as Massachusetts Route 97 and continues on to Haverhill.  NH 97 is named Main Street along its entire length.

Supporting paragraphs: New Hampshire Route 121 Chester, New Hampshire
Answer: 4,768