Cass County, Illinois
Lat/Long: 39.9500, -90.2333
Cass County was created in 1837 out of Morgan County. In 1845, the Illinois General Assembly increased its size by annexing to it the northern portion of Morgan County. The county seat is Virginia.
An Act for the Formation of the County of Cass; An Act to Provide for the Location of the County Seat of Cass County; "An Act Extending the Limits of Cass County," 26 February 1845, Laws of the State of Illinois (1845), 313-15.