Whitney Avenue is a principal arterial connecting Downtown New Haven with the town center of Hamden in the U.S. state of Connecticut. Most of the road within the city of New Haven is included in the Whitney Avenue Historic District, which is listed on the National Register of Historic Places. The designation begins at Grove Street in the northern part of Downtown New Haven and extends through the town of Hamden up to the Cheshire town line. North of Dixwell Avenue in Hamden Center, the road is a state highway and designated as part of Route 10. From the New Haven town line to Dixwell Avenue, the road is state-maintained with an unsigned designation of State Road 707. Within New Haven, Whitney Avenue is a town road. The J route of Connecticut Transit New Haven, which connects New Haven to Waterbury, runs along Whitney Avenue.