Brown County, Illinois
Lat/Long: 39.9667, -90.7333
The Illinois legislature created Brown County in 1839 from part of Schuyler County. The county seat is Mt. Sterling.
An Act to Create the County of Brown out of the County of Schuyler; Combined History of Schuyler and Brown Counties, Illinois (Philadelphia: W. R. Brink, 1882), 67.