J. Howard Catlin House

Northfield is an unincorporated village in the town of Litchfield, Litchfield County, Connecticut. The village of Northfield resides in the southeastern corner of Litchfield. Northfield shares an indefinite northern boundary with the rest of Litchfield proper, this boundary is roughly co-terminus with that of the Northfield Fire District. The village is bordered on the east by the town of Harwinton, on the south by the town of Thomaston, and on the west by the town of Morris. As of the 2010 Census, 1,378 residents reside in the village of Northfield. As part of the town of Litchfield, students in Northfield attend Litchfield Public Schools. It is the home of the former Northfield Knife Company, which was founded in 1858 and ceased operations in 1926. The factory resided directly across the street from what is known as Knife Shop Dam. The foundations of the original knife factory still remain, and were listed on the National Register of Historic Places in 1997. Both Northfield Pond and the Knife Shop Dam are part of Humaston Brook State Park. This undeveloped 141 acre state park provides visitors with both hiking and fishing opportunities.

Humaston Brook State Park is an under-developed day use state park located in the village of Northfield, Connecticut. It preserves a stretch of Humaston Brook, a tributary of the Naugatuck River. Its major feature is Northfield Pond, created by damming in the 19th century. It is commonly known by residents as Knife Shop Pond. It also includes the foundations of the former Northfield Knife Company located along the banks of the brook below the dam, which was the location of one of Litchfield's largest 19th-century employers. Activities in the park include hiking and fishing.

Thomaston is a town in Litchfield County, Connecticut, United States. The town is part of the Naugatuck Valley Planning Region. The population was 7,442 at the 2020 census. The urban center of the town is the Thomaston census-designated place, with a population of 1,928 at the 2020 census.

Black Rock State Park is a seasonal public recreation area adjoining Mattatuck State Forest in the town of Watertown, Connecticut. The state park covers 444 acres (180 ha) and is known for its large rock face, Black Rock, that offers views of Thomaston, Watertown, and portions of Waterbury. The park is managed by the Connecticut Department of Energy and Environmental Protection.

The Hose and Hook and Ladder Truck Building is a historic former firehouse on Main Street in Thomaston, Connecticut. Built in 1882, it is a fine example of Late Victorian civic architecture in brick. It was listed on the National Register of Historic Places on January 4, 1982. After serving as a firehouse for about a century, it has been converted into an art gallery.

The Thomaston Opera House is a historic performance venue and the town hall of Thomaston, Connecticut. Located at 153 Main Street, it was built in 1883-85, and is a good local example of Romanesque architecture. The theater in the building has served as a performance and film venue since its construction. It was listed on the National Register of Historic Places in 1972. The opera house's principal tenant is now the Landmark Community Theatre.

Trinity Church is a historic episcopal church at 160 Main Street in Thomaston, Connecticut. Built in two stages, 1871 and 1880, to a design by Richard M. Upjohn, it is a good example of Gothic and Stick Style architecture. The church was listed on the National Register of Historic Places in 1984. It is now part of a merged parish with St. Peter's of Plymouth.

Thomaston High School is a public school for grades 7 through 12 in Thomaston, Connecticut. The school has an enrollment of about 350 students.

The Railroad Museum of New England is a railroad museum based in Thomaston, Connecticut. Through its operating subsidiary known as the Naugatuck Railroad, the museum operates excursion and freight trains on the Torrington Secondary between Waterville and Torrington. The Railroad Museum of New England name and trademark was adopted in 1987, as a result of reassessing the Connecticut Valley Railroad Museum's goals and visions (CVRM had been founded in the mid-1960s). Home to one of the largest collections of preserved historic railroad equipment in New England, RMNE and its predecessor organizations have been active since the 1960s.

The Reynolds Bridge in Thomaston, Connecticut is an open-spandrel concrete arch bridge carrying Waterbury Road (unsigned State Road 848) over the Naugatuck River. Built in 1928, it is one of a small number of surviving open-spandrel bridges in the state. It was listed on the National Register of Historic Places in 2004.