| Nat Ganley Papers | 1934-1969 | | LP000320 |
| Marshall Ganz Papers | 1968-1980 | | LP001528 |
| Phillips Garman Papers | 1907-1947 | | LP000537 |
| Delmond Garst Papers | 1934-1971, bulk 1938-1960 | | LP000436 |
| William C. Gausmann Papers | 1942-1977 | | LP000901 |
| Catherine Gelles Papers | 1937-1981 | | LP001253 |
| William Genske Papers | 1940-1960 | | LP000024 |
| Charles Gentile Papers | 1934-1966 | | LP000440 |
| Dan Georgakas Papers | 1958-1980 | | UP001041 |
| Gerry Meister Papers | 1971-1995, bulk 1971-1988 | | LP002233 |
| GI Underground Press Records | 1967-1971, bulk 1970 | | LR000485 |
| Horace W. Gilmore Papers | 1957-1969 | | UP000549 |
| Martin and Jessie Glaberman Papers | 1939-2001 | | LP000621 |
| Margean Gladysz Papers | 1946-2004, bulk 1946-1949 | | UP002125 |
| Morris Gleicher Papers | 1965-1992 | | UP001536 |
| William Goldmann Papers | 1937-1959 | | LP000288 |
| Mrs. S. S. (Clara) Goldwater Papers | 1936-1958 | | LP000461 |
| Bill Goode Papers | 1941-1947 | | LP001165 |
| Ernest Goodman Papers | 1929-1997, bulk 1940-1975 | | UP001152 |
| Ralph J. Goodman Papers | 1960-1981 | | LP001067 |
| Jean Gould Papers | 1907-1973 | | LP000426 |
| William B. Gould IV Papers | 1971-1981 | | LP001277 |
| Government Military Investigations - Auto Industry Records | 1933-1940 | | LR001143 |
| Grace Hospital Records | 1880-1993 | | UR001352 |
| Grace Hospital Women's Auxiliary Records | 1939-1983 | | UR001352 |
| Lawrence Gracia Papers | 1930-40 | | LP001105 |
| Graduate Employees Union at Michigan State University | 1999-2002 | | LR001775 |
| Grand Rapids Education Association Records | 1907-1967 | | LR000314 |
| Anna Melissa Graves Papers | 1921-1948 | | LP000708 |
| Elaine Graves Papers | 1972-1978, bulk 1976-1978 | | LP000911 |
| Goddard Graves Papers | 1940-1976 | | LP000644 |
| Robert J. Greene Papers | 1948-1991 | | UP001485 |
| Thomas Emil Groehn Papers | 1943 | | LP000695 |
| Grosse Pointe Civil Rights Organizations Records | 1963-1973 | | UR001456 |
| Mark Grossman Papers | 1969-1981, bulk 1979-1980 | | LR001045 |
| Phyllis Groves Papers | 1968-1969 | | |
| Robert Guthridge Papers | 1967-1978 | | LP000878 |
| Carl Haessler Papers | 1916-1961 | | LP000031 |
| Robert Halbeisen Papers | 1937-1956 | | LP000074 |
| Cecil W. Halbert Papers | circa 1931 | | LP000963 |
| Henry Hamilton Papers | 1966-1968 | | LP000315 |
| Mike Hamlin and Joann Castle Papers | 1968-1973 | | LP001946 |
| Luella Hannan Memorial Foundation Records | 1927-1988 | | UR001926 |
| William Hardy Papers | 1937 | | LP000318 |
| Bruce Harkness Poletown Photographic Collection | 1981 | | |
| Harper Hospital Records | 1857-1989 | | UR001446 |
| Richard E. Harris Papers | 1970 | | LP001017 |
| Charles T. Hawkins Papers | 1956-1977, bulk 1960-1969 | | LP000987 |
| Francis Heisler Papers | 1936-1976 | | LP001036 |
| Helen Bower Papers | 1934-1995, bulk 1947-1970 | | LP0001878 |
| Philip Heller Papers | 1945-1955 | | LP000585 |
| Jack R. Hendrickson Sr. Papers | 1970-1985 | | UP001284 |
| Thomas A. Hendricks Papers | 1940-1981, bulk 1940-1949 | | LP001337 |
| William Henkelman Papers | 1943-1980 | | LP000610 |
| Joyce Hennessee Papers | 1970s-1980s | | LP001524 |
| Westray Henney Papers | 1951-1970 | | LP000587 |
| Merle Henrickson Papers | 1945-1973, bulk 1945-1950 | | LP000193 |
| Aaron Henry Papers | 1965-1969 | | UP000364 |
| Frank Henson Papers | 1950-1963 | | LP000059 |
| Paul Hering Papers | 1912-1969 | | |
| John Herling Papers | 1911-1991, bulk 1930s-1970s | | LP001259 |
| Mary Fox Herling Papers | 1914-1980 | | LP001729 |
| Mary J. Herrick Papers | 1932-1966 | | LP000385 |
| Charles A. Hill Papers | 1942-1951 | | UP000227 |
| Joe Hill Papers | 1915-1916 | | LP001154 |
| Ellen Hippeli Papers | 1922-2007 | | LP002182 |
| John S. Hirchak Papers | 1917-1925 | | LP000787 |
| Harley B. Hiscox Papers | 1968-1984 | | LP001216 |
| Robert G. Hodges Papers | 1962 | | UP001196 |
| Jimmy Hoffa FBI Files | 1964-2002, bulk 1975-1992 | | LP001882 |
| Bernard G. Hoffman Papers | 1940-1960 | | LP000445 |
| Claude Hoffman Papers | 1934-1952, bulk 1935-1938 | | LP000324 |
| S. L. Hoffman Papers | 1942-1970 | | LP000422 |
| Floyd Hoke-Miller Papers | 1939-1977 | | LP000903 |
| Susan Holleran Papers | 1979-1988, bulk 1982-1988 | | LP001389 |
| Flora Hommel Papers | 1950-2005, bulk 1950s-1980s) | | UP002090 |
| Raymond Hood Papers | 1961-1982 | | UP000581 |
| Ernest L. Horne Papers | 1975-2000, bulk 1987-1995 | | UP001642 |
| Howard Hursey Papers | 1961-1980 | | LR002047 |
| Michael Hrabar Papers | 1944-1974, bulk 1949-1969 | | LP001281 |
| Olga Hrabar Papers | 1941-1985 | | LP000313 |
| Dolores Huerta Papers | 1970-1995 | | LP001861 |
| Arthur Hughes Papers | 1936-1978 | | LP000233 |
| William Humphreys Papers | 1944-1953 | | LP000170 |
| Hutzel Hospital Records | 1868-1985 | | UR001572 |
| Curt Hyans Papers | 1907-1957 | | LP000677 |
| Charles K. Hyde Papers | 1980-1997 | | UP001688 |
| Nicholas Hyshka Papers | 1944-1966 | | LP000302 |
| Andres J. Ignasiak Papers | 1946-1966 | | LP000196 |
| Illinois Labor History Society Records | 1938-1944 | | LR000947 |
| Marie and David Ingar Papers | 1972 | | LP000642 |
| International Conference of Women Engineers and Scientists Records | 1961-1005, bulk 1961-1996 | | LR001689_guide |
| International Institute of Metropolitan Detroit Records | 1919-1981 | | UR001004_Det |
| International Institute of Metropolitan Detroit: Florence Cassidy Records | 1929-1973 | | UR001004_Cassidy |
| International Institute of Metropolitan Detroit: Old World Market Records | 1945-1979 | | UR001004 |
| International Longshoremen’s & Warehousemen’s Union Records | 1957-1982 | | LR001276 |
| International Printing Pressmen Local 2 Records | 1899-1961 | | LR000781 |
| Iron Molders Union, New York Records | 1860-1894 | | LR000601 |
| Joan Israel Papers | 1966-1977 | | UP000797 |
| Larry Itliong Papers | 1942-1976 | | LP001325 |