Delta is a borough in York County, Pennsylvania, United States and one of the southernmost communities in Pennsylvania. The population was 741 at the 2000 census. It is served by the South Eastern School District which provides a public education.
Delta is located at 39°43′38″N 76°19′32″W / 39.72722°N 76.32556°W / 39.72722; -76.32556 (39.727207, -76.325668).
According to the United States Census Bureau, the borough has a total area of 0.3 square miles (0.7 km²), all of it land.