It is generally the area in the vicinity of the intersection of Route 322 and Marion Avenue, just north of the Cheshire town line.

The community's 18th-century farms were located along a north–south road from Bristol to New Haven (now Marion Avenue) that passed through the area.

In June 1781, French troops under Rochambeau's command left Farmington and marched 13 miles (21 km) to Marion, where they made their eighth camp along their route through Connecticut.

Rochambeau and his officers took shelter in Asa Barns' tavern, and the troops set up camp on a hill on the other side of the road.

Small-scale industrial activity began in the 19th century, including the manufacture of carriage bolts and nuts in the factory of L.B.

[4] The nomination described the district as being architecturally significant "as a collection of well-preserved buildings dating from the 18th, 19th, and early 20th centuries which together reflect the historical development of the Marion community of Southington."