| Stephenson County Illinois Cities/Towns -
Cedarville, Dakota, Davis, Freeport (County Seat), German Valley, Lake Summerset, Lena, Orangeville, Pearl City, Ridott, Rock City, Winslow |
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Your Ad Here Stephenson County is a county located in the U.S. state of Illinois. As of 2000, the population was 48,979. Its county seat is Freeport. History Stephenson County was formed in 1837. The County was named for Colonel Benjamin Stephenson, an official of the Illinois Territory. ![]() |