| Decatur | Assessor | Persons Subject to Military Duty | 1901-1906 |
| Decatur | Auditor | Real Estate Transfers-Lands | 1874-1910 |
| Decatur | Auditor | Real Estate Transfers-Lands & Town Lots-Index | 1874-1910 |
| Decatur | Auditor | Real Estate Transfers-Town Lots | 1874-1908 |
| Decatur | Clerk | Circuit Court-Complete Circuit Court Record | 1874-1886 |
| Decatur | Clerk | Circuit Court-General Index | 1873-1886 |
| Decatur | Clerk | District Court-General Index | 1871-1945 |
| Decatur | Clerk | District Court-Judgment Docket | 1898-1920 |
| Decatur | Clerk | District Court-Lien Record | 1925-1976 |
| Decatur | Clerk | District Court-Record | 1874-1900 |
| Decatur | Clerk | Naturalizaions-Applications | 1875-1904 |
| Decatur | Clerk | Naturalizations-Certificates | 1902-1920; 1922-1924 |
| Decatur | Clerk | Naturalizations-Declaration of Intent | 1902-1926 |
| Decatur | Clerk | Naturalizations-First Papers | 1875-1902 |
| Decatur | Clerk | Naturalizations-Petitions | 1902-1928 |
| Decatur | Clerk | Probate Court-Minutes | 1843-1855 |
| Decatur | Clerk | Probate-Annual Reports | 1894-1909 |
| Decatur | Clerk | Probate-Bonds-Adm, Gdn | 1894-1902 |
| Decatur | Clerk | Probate-Bonds-Exec | 1889-1902 |
| Decatur | Clerk | Probate-Calendar | 1873-1887 |
| Decatur | Clerk | Probate-Case Files | 1974-1926 |
| Decatur | Clerk | Probate-Case Files-Index | 1874-1926 |
| Decatur | Clerk | Probate-Combined Probate Docket | 1887-1936 |
| Decatur | Clerk | Probate-Complete Probate Record | 1871-1942 |
| Decatur | Clerk | Probate-Final Reports-Adm, Gdn | 1894-1906 |
| Decatur | Clerk | Probate-General Index | 1892-1973 |
| Decatur | Clerk | Probate-Record | 1874-1928 |
| Decatur | Clerk | Probate-Wills | 1874-1935 |
| Decatur | Clerk | Vital Stats-Divorces | 1906-1945 |
| Decatur | Municipal | Deeds-Cemetery Deeds | 1800s |
| Decatur | Municipal-Garden Grove | Board of Health Minutes | 1880-1893 |
| Decatur | Municipal-Garden Grove | Burial or Removal Permits | 1900-1990 |
| Decatur | Municipal-Garden Grove | Cemetery Lots | 1879-1936 |
| Decatur | Municipal-Garden Grove | Licenses Embalmers-Certificates | 1918-1929 |
| Decatur | Municipal-Garden Grove | Transportation of Corpses | 1918-1923 |
| Decatur | Municipal-Garden Grove | Vital Stats-Deaths-Record | 1928-1933 |
| Decatur | Private | Bible, Family, Scrapbooks Records | 1800s-1900s |
| Decatur | Recorder | Abstract of Conveyance | 1851-1874 |
| Decatur | Recorder | Affidavits-Index | 1909-1976 |
| Decatur | Recorder | Affidavits-Record | 1911-1944 |
| Decatur | Recorder | Articles of Incorporation-Index | 1910-1976 |
| Decatur | Recorder | Deeds-Lands-General Index | 1874-1901 |
| Decatur | Recorder | Deeds-Lands-Record | 1863-1904 |
| Decatur | Recorder | Deeds-Sheriff's Deeds | 1888-1901 |
| Decatur | Recorder | Deeds-Tax Deeds | 1882-1943 |
| Decatur | Recorder | Deeds-Town Lots-Index & Record | 1874-1894 |
| Decatur | Recorder | Maps/Plats-Plat Book-Index & Record | 1874-1976 |
| Decatur | Recorder | Military Discharge Record | 1917-1919 |
| Decatur | Recorder | Miscellaneous Record-Index & Record | 1874-1904 |
| Decatur | Recorder | Mortgages-Chattels-Index | 1839-1966 |
| Decatur | Recorder | Mortgages-Lands-Index | 1874-1891 |
| Decatur | Recorder | Mortgages-Lands-Record | 1874-1883 |
| Decatur | Recorder | Mortgages-Town Lots-Index | 1874-1890 |
| Decatur | Recorder | Mortgages-Town Lots-Record | 1874-1907 |
| Decatur | Recorder | Original Entries, abstract | 1856-1866 |
| Decatur | Recorder | Surveyor's Field Notes | 1856-1886 |
| Decatur | Recorder | Vital Stats-Births-Record | 1880-1904; 1906-1908; 1918-1938 |
| Decatur | Recorder | Vital Stats-Deaths-Record | 1880-1904; 1906-1948 |
| Decatur | Recorder | Vital Stats-Delayed Birth Record (filed in Birth Rec volumes)] | 1880-1938 |
| Decatur | Recorder | Vital Stats-Marriages-Record | 1874-1933 |
