| Lucas | Auditor | Real Estate Transfers-Lands | 1866-1901 |
| Lucas | Auditor | Real Estate-Transfers-Town Lots | 1853-1932 |
| Lucas | Bd of Commissioners | Board of Commissioners-Minute Books | 1849-1851 |
| Lucas | Bd of Supervisors | Board of Supervisor's Minute Books | 1861-1902 |
| Lucas | Clerk | Circuit Court-Minute Book of Gold & Silver Mining Co | 1880-1882 |
| Lucas | Clerk | County Court-Record | 1851-1858 |
| Lucas | Clerk | County Home Visitor's Register | 1918-1944 |
| Lucas | Clerk | Naturalizations-Declaration of Intent | 1854-1929 |
| Lucas | Clerk | Naturalizations-First & Second Papers | 1885-1906 |
| Lucas | Clerk | Naturalizations-First Papers | 1854-1885 |
| Lucas | Clerk | Naturalizations-Minors | 1887-1901 |
| Lucas | Clerk | Naturalizations-Petition & Record | 1916-1929 |
| Lucas | Clerk | Naturalizations-Petitions | 1902-1929 |
| Lucas | Clerk | Poor House-Register | 1871-1919 |
| Lucas | Clerk | Probate-Appearance Docket | 1888-1916 |
| Lucas | Clerk | Probate-Bonds-Adm, Exec, Gdn | 1851-1929 |
| Lucas | Clerk | Probate-Calendar-Gdn | 1861-1875 |
| Lucas | Clerk | Probate-Combined Collateral Inheritance Tax Record | 1898-1930 |
| Lucas | Clerk | Probate-Combined Probate Docket | 1888-1928 |
| Lucas | Clerk | Probate-Complete Probate Record | 1870-1932 |
| Lucas | Clerk | Probate-Deed Record | 1894-1926 |
| Lucas | Clerk | Probate-Inventories & Appraisements | 1890-1927 |
| Lucas | Clerk | Probate-Record | 1850-1927 |
| Lucas | Clerk | Probate-Reports | 1879-1927 |
| Lucas | Clerk | Probate-Wills | 1861-1945 |
| Lucas | Clerk | Probate-Wills on Deposit | 1884-1910 |
| Lucas | Clerk | Vital Stats-Divorces | 1906-1924 |
| Lucas | Private | Cemetery, Family, Funeral Home Records | 1800s-1900s |
| Lucas | Recorder | Affidavits-Index & Record | 1907-1931 |
| Lucas | Recorder | Deeds-Lands-Index & Record | 1849-1903 |
| Lucas | Recorder | Deeds-Sheriff's Deeds | 1879-1886 |
| Lucas | Recorder | Deeds-Town Lots-Record & Index | 1854-1903 |
| Lucas | Recorder | Homestead Record & Index | 1862-1967 |
| Lucas | Recorder | Maps/Plats-Irregular Plat Book | 1800s |
| Lucas | Recorder | Maps/Plats-Irregular Surveyor's Record | 1800s |
| Lucas | Recorder | Military Discharge Record & Index | 1900-1941 |
| Lucas | Recorder | Miscellaneous Record & Index | 1878-1903 |
| Lucas | Recorder | Mortgages-Lands-Index | 1864-1885 |
| Lucas | Recorder | Mortgages-Town Lots-Index | 1866-1890 |
| Lucas | Recorder | Original Entries, abstract | 1849-1856 |
| Lucas | Recorder | Vital Stats-Births-Index | 1880-1935 |
| Lucas | Recorder | Vital Stats-Births-Record | 1880-1904; 1906-1935 |
| Lucas | Recorder | Vital Stats-Deaths-Index | 1880-1935 |
| Lucas | Recorder | Vital Stats-Deaths-Record | 1880-1904; 1906-1935 |
| Lucas | Recorder | Vital Stats-Marriages-Index | 1866-1903 |
| Lucas | Recorder | Vital Stats-Marriages-Record | 1849-1930 |
| Lucas | Treasurer | Old Age Pension Tax Lists | 1934-1937 |
| Lucas | Treasurer | Treasurer's Tax Deed Record | 1872-1923 |
