Helpful Websites for Chicago Genealogy Research

City Directories

Ancestry.com (subscription site; free access at FHCs) 1839-1947 ChicagoAncestors.org 1866, 1870, 1871, 1880, 1885, 1892, 1900, 1910, 1923
Chicago History Museum 1928 Reverse (loads slowly)
CousinConnect.com 1844, 1855
Fold3.com (subscription site; free access at FHCs) 1843-1923
Internet Archive Many years, includes Blue Books

Maps

ChicagoAncestors.org
Locate addresses on map; view nearby institutions; search city directories
Chicago ImageBase
View Chicago fire insurance maps
Street Re-numbering 1909
Learn about Chicago's street numbering system; convert early addresses
Street Name Changes
Convert old street names to new; guide complied in 1948
Federal Township Plats—Illinois
David Rumsey Map Collection
State Census Records
Learn about Illinois state (not federal) census records
A Look At Cook Locate census enumeration districts

Neighboring Counties and States

Photographs

Charles W. Cushman Photograph Collection View Ilinois photographs, 1939-1953 (2484 images)