The information you seek is a common tool for genealogists. I am referring to Thorndale and Dollarhide's 1987 "Map Guide to the U.S.Federal Censuses, 1790-1920, published by the Genealogical Publishing Company, Inc. in Baltimore. Every library of any size has one of these in hardback or softback in their reference section. The Missouri maps run from page 191 through page 198.

This authoritative source shows several changes after 1860.

Bruce Nichols