U.S. Route 6N (US 6N) is a 28-mile-long (45 km) auxiliary route of US 6 that is located in Erie County, Pennsylvania in the United States. The western terminus is situated at US 20 in West Springfield, one-half mile (0.80 km) north of Interstate 90 (I-90) exit 3. Its eastern terminus is located at US 6 and US 19, west of Mill Village.

Erie County is a county in the Commonwealth of Pennsylvania. It is the northernmost county in Pennsylvania. As of the 2020 census, the population was 270,876. Its county seat is Erie. The county was created in 1800 and later organized in 1803. The county is part of the Northwest Pennsylvania region of the state.