USA (1,403,636) > Illinois (56,247) > Mercer County (274) > Mercer County Immigration Records (2)
USA (1,403,636) > Illinois (56,247) > Illinois Immigration Records (491) > Mercer County Immigration Records (2)
NOTE: Additional records that apply to Mercer County are also on the Illinois Immigration Records page.
Illinois, Federal Naturalization Records, 1856-1991 Ancestry
US Naturalization Record Index, Northern Illinois, 1840-1950 ( includes Mercer County, IL) MyHeritage