Newington Junction is a section of the town of Newington, Connecticut, United States. It is centered at the intersection of Willard Avenue (Route 173) and West Hill Road in the northwestern part of the town, in the area generally just south of the Hartford city line. The name of the area refers to the railroad junction where the railroad line from New Haven meets with the railroad line from Bristol and Waterbury. The development of Newington Junction as a result of the railroad was instrumental in the separation of the town of Newington from its mother town of Wethersfield.
The area is also architecturally significant for the range of styles used in houses built during the period of significance of the area. The neighborhood contains houses with architectural styles from the late 18th century to the early 20th century. For reasons of both historical and architectural significance, a significant portion of the neighborhood has been listed on the National Register of Historic Places as historic districts. The architectural centerpiece of Newington Junction is the Willard Homestead and the Newington Junction Railroad Depot located in the center of the neighborhood. Both properties are separately listed on the National Register. Because the central area is now surrounded by incompatible modern structures, the architecturally significant areas of the neighborhood have been grouped into three clusters, each designated as a separate historic district, namely, Newington Junction South, North, and West Historic Districts.