Elgin is a borough in Erie County, Pennsylvania, United States. The population was 204 at the 2020 census. It is part of the Erie Metropolitan Statistical Area. Places of recreation include Elgin Community Park. Elgin is home to the oldest borough building in Erie County.

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.