The state has copies of the state censuses of 1820, 1825, 1830, 1835, 1840, 1845, 1855, 1865. [I don't think there was an 1850 or 1860.] These might be useful in tracking folks who fall into the cracks between censuses. http://www.sos.state.il.us/depts/archives/serv_sta.html Here's an example: STATE CENSUS. 1865. 35 vols. Partial index. The 1865 population census for Illinois was compiled in each county by census commissioners appointed by the county commissioners courts and filed with the Secretary of State. The census was authorized under an 1845 act, as amended in 1855 (Rev. Stat. 1845, p. 89; L. 1855, p. 151). Each county return includes for each household name of head of household; numbers of free white males and females in each decennial age group (e.g., ages 0-9, 10-19, 20-29); numbers of male and female Negroes; total number of inhabitants in household; number of males eligible for duty in state militia; type (e.g., blacksmith shop, wheelwright shop) and valuation of products of manufacturing establishments; valuations of livestock, grain products, and other agricultural products; tons of coal produced annually; pounds of wool products; and numbers of flour and gristmills, sawmills, and distilleries. Also included in each return are numbers of universities, academies, grammar schools, and common schools and number of pupils enrolled in each. Each return also includes signature of census commissioner certifying return, date certified, and occasional recapitulations of totals. Legal subdivisions also are indicated such as cities, towns, and townships and recapitulations frequently are given for them. Returns are included for the following counties: <snip - it includes Logan> 1865 This final state census (R.S. 103.010) currently is indexed only partially. County and township residences are necessary for efficient searches. Searches of unindexed townships with populations exceeding 2,500 cannot be performed because of limitations on staff research time. Again only the names of the heads of households are given. Guidelines for Research at the Illinois State Archives Genealogical research inquiries regarding state and related federal governmental records should be directed to: Illinois State Archives Reference Unit Margaret Cross Norton Building Capitol Complex Springfield, IL 62756 Telephone: (217) 782-3556 Fax: (217) 524-3930 The Archives welcomes inquiries. Researchers can request copies of documents by mail, by fax, by telephone, or by personal visit. A number of the Archives' record series holdings are particularly useful to the genealogist and many have been indexed for rapid access. Archives reference staff will search these indexed records and provide unofficial and uncertified photocopies of requested records. In making requests please follow the guidelines below. Request no more than two specific names or items per mailing. For name searches try to provide 1) the individual's complete name, age, and birthplace, 2) county and township names, and 3) the name of the record to be searched as well as its date span. Wait for a response to one request before submitting another one. Cheryl Rothwell LoganCty@mindspring.com Coordinator, Logan County, ILGenWeb Project http://www.rootsweb.com/~illogan/loindex.htm Logan County mailing list> LOGAN-L-request@rootsweb.com Downing mailing list> DOWNING-L-request@rootsweb.com Harding mailing list> HARDING-L-request@rootsweb.com Downing query board> http://cgi.rootsweb.com/~genbbs/genbbs.cgi/FamilyAssoc/Downing Lucas query board> http://cgi.rootsweb.com/~genbbs/genbbs.cgi/FamilyAssoc/Lucas