McKnightstown is a census-designated place (CDP) in Franklin Township, Adams County, Pennsylvania, United States.

The founder of the Eshelman manufacturing company was born in the town, and the 1919 Motor Transport Corps convoy travelled through the town on the Lincoln Highway before a modern highway bypassed the town in 1948-9.

[6] It is in the Gettysburg Area School District.

[7] Franklin Township Elementary School has an Orrtanna post office address,[8] but is physically in the Cashtown CDP.

[10] The district's comprehensive middle and high schools are Gettysburg Area Middle School and Gettysburg Area High School.