About This Place
Keithsburg is a city in Mercer County, Illinois, United States. The population was 714 at the 2000 census.
Keithsburg is located at 41°6′0″N 90°56′14″W / 41.1°N 90.93722°W / 41.1; -90.93722 (41.100020, -90.937293).
According to the United States Census Bureau, the city has a total area of 3.2 square miles (8.2 km²), of which, 2.6 square miles (6.7 km²) of it is land and 0.6 square miles (1.6 km²) of it (18.87%) is water.