When researching ancestors in McLean County, one should always bear in mind
the county was not created until 1854, when it was formed from parts of Muhlenberg , Daviess and Ohio counties. Births, deaths, or marriages prior to 1854 will be found in the records of these counties.
County Formation/Census Maps
|1790 Census Lines. The Green River divides Nelson and Lincoln.|
|County Lines from 1810. The Green River divides Ohio and Muhlenberg.|
|County Lines from 1820 through the creation of McLean in 1854. The Green River divides Daviess and Muhlenberg. The Daviess and Ohio line drawn here is very approximate.|
Created using information from Map Guide to the U.S. Federal Censuses,
1790-1920 by William Thornsdale and William Dollarhide.
Published by Genealogical Publishing Co, Inc
Maps are modifications of a original map from the U.S. Census Bureau Tiger Mapping Service