Hello Penny, Russellville is not in Yell County, AR. It is in Pope County and has been since that county was formed. As far as I know the only time the county lines changed was when the new county was formed and named. Here is the progression of county line and name changes. Arkansas County was the original county - established 31 Dec 1813. Pulaski County was carved from Arkansas County - 15 Dec 1818. Crawford County was carved from Pulaski County - 18 Oct 1820. Pope County was carved from Crawford county - 2 Nov 1829. Yell County was carved from Pope County - 5 Dec 1840. Hope this helps in your search. Dixie Hickey