Smicksburg is a borough in Indiana County, Pennsylvania, United States. The population was 49 at the 2000 census, and is one of the smallest incorporated boroughs in Pennsylvania. It was founded by Reverend J. George Schmick. Most of the citizens are Amish.
Smicksburg is located at 40°52′7″N 79°10′13″W / 40.86861°N 79.17028°W / 40.86861; -79.17028 (40.868715, -79.170415).
According to the United States Census Bureau, the borough has a total area of 0.1 square miles (0.4 km²), all of it land.