| Johnson | Assessor | Assessment Rolls | 1844-1845 |
| Johnson | Assessor | Assessor's Book-Iowa City | 1859-1912 |
| Johnson | Auditor | Widow's Pension & Dependent Children-Ledger | 1913-1943 |
| Johnson | Bd of Commissioners | Board of Commissioners-Minute Books | 1847-1858 |
| Johnson | Bd of Commissioners | Census-Iowa City | 1844-1844 |
| Johnson | Bd of Supervisors | Voter Registration-Iowa City | 1897-1904 |
| Johnson | Clerk | Applications for Pension for Blind | 1915-1922 |
| Johnson | Clerk | County Judge's-Minute Book | 1860-1886 |
| Johnson | Clerk | District Court-Divorce-Case Files | 1851-1914 |
| Johnson | Clerk | District Court-General Index | 1920-1934 |
| Johnson | Clerk | District Court-Record | 1842-1866 |
| Johnson | Clerk | Justice of the Peace-Combined Dockets-(civil cases) | 1921-1936 |
| Johnson | Clerk | Justice of the Pease-Combined Dockets (marriages) | 1822-1934 |
| Johnson | Clerk | Naturalizations-Declaration of Intent | 1906-1956 |
| Johnson | Clerk | Naturalizations-Files | 1903-1923 |
| Johnson | Clerk | Naturalizations-Final Papers | 1859-1906 |
| Johnson | Clerk | Naturalizations-First Papers | 1857-1906 |
| Johnson | Clerk | Naturalizations-Minors | 1890-1904 |
| Johnson | Clerk | Naturalizations-Petition & Record | 1903-1923 |
| Johnson | Clerk | Probate-Annual Reports-Adm & Gdn | 1889-1897 |
| Johnson | Clerk | Probate-Appointments-Adm, Exec, Gdn | 1887-1907 |
| Johnson | Clerk | Probate-Deed Records | 1888-1919 |
| Johnson | Clerk | Probate-Final Reports | 1894-1898 |
| Johnson | Clerk | Probate-General Index | 1840-1915 |
| Johnson | Clerk | Probate-Inventories | 1891-1896 |
| Johnson | Clerk | Probate-Record | 1847-1897 |
| Johnson | Clerk | Probate-Wills | 1852-1912 |
| Johnson | Co Sheriff | Assessment Rolls (copies) | 1844-1853 |
| Johnson | Co Sheriff | Militia Register | 1844-1844 |
| Johnson | Recorder | Deeds-Lands/Town Lots-Record | 1839-1891 |
| Johnson | Recorder | Deeds/Mortgages-Lands/Town Lots-Index | 1839-1905 |
| Johnson | Recorder | Mortgages-Chattels-Record | 1872-1877 |
| Johnson | Recorder | Mortgages-Lands/Town Lots-Record | 1840-1905 |
| Johnson | Recorder | Original Entries, abstract | 1840-1854 |
| Johnson | Recorder | Vital Stats-Births-Record | 1880-1904; 1906-1940 |
| Johnson | Recorder | Vital Stats-Deaths-Record | 1880-1904; 1906-1919; 1921-1932 |
| Johnson | Recorder | Vital Stats-Marriages-Record | 1839-1910 |
| Johnson | Treasurer | Old Age Assistance Pension Tax List | 1935-1937 |
| Johnson | Treasurer | Tax Lists-General | 1913-1923 |
