The following is a list of mixed-sex colleges and universities in the United States, listed in the order that mixed-sex students were admitted to 4-year college-level courses.
Many of the earliest mixed-education institutes offered co-educational secondary school-level classes for three or four years before co-ed college-level courses began – these situations are noted in the parentheticals below.
| 1837 | Oberlin College (co-ed secondary classes began in 1833)[1][2][3][4] |
| 1844 | Hillsdale College (second U.S. college to grant four-year degrees to women)[5] |
| 1845 | Franklin College (co-ed secondary-level classes began in 1842 at "Indiana Baptist Manual Labor Institute"; chartered as Franklin College in 1845)[6][7] |
| 1847 | Baylor College (until 1851 Baylor offered "coeducation" in the same building, although in separate classes; after 1851 the school fully segregated the sexes until 1887)[8][9][10] |
| 1849 | New-York Central College (disestablished 1860) Otterbein University[11] |
| 1851 | Waynesburg College[12] |
| 1852 | Westminster College[13] |
| 1853 | Antioch College[14] Lawrence University (co-ed secondary classes began in 1849)[15] Willamette University (co-ed secondary classes began in 1842)[16] |
| 1854 | Muskingum University[17] Urbana University (co-ed secondary classes began in 1850)[18] |
| 1855 | Baldwin University (co-ed secondary classes began in 1845)[19] Bates College[20][21] University of Iowa (first coeducational public or state university in the United States)[2][3] |
| 1856 | St. Lawrence University[22] Wilberforce University (first coeducational HBCU in the United States) |
| 1857 | Alfred University (co-ed secondary classes began in 1836; it received its university charter in 1857)[23][24] Hamline University (co-ed secondary classes began in 1854)[25] |
| 1858 | University of Mount Union (co-ed classes began in 1846; chartered as college in 1858)[26] |
| 1859 | Olivet College (co-ed secondary classes began in 1844; chartered as college in 1859)[27] |
| 1862 | Baker University (co-ed secondary classes began in 1858) |
| 1863 | Kansas State University[28][29] |
| 1866 | University of Wisconsin–Madison (women admitted to classes in the "Normal Department" in 1863 and all college classes about 1866, although separate Female College and separate graduation existed until 1874)[30][31] |
| 1867 | Carleton College[32] DePauw University[33] Hiram College (co-ed secondary classes began in 1850) Indiana University[4][34] |
| 1868 | Oregon State University (co-ed secondary classes began about 1858; chartered as college in 1868) University of Missouri[35] |
| 1869 | Berea College[36] Boston University[37] Iowa State University[38][39] University of Kansas (co-ed secondary classes began in 1866)[40] University of Minnesota Northwestern University[41] Ohio University Swarthmore College[42] Washington University in St. Louis[14] |
| 1870 | University of California, Berkeley[34][43] Cornell University[44][45] University of Illinois[34] University of Iowa Medical School[46] Knox College[47] Michigan State University[48] College of Wooster[49] |
| 1871 | California Wesleyan College Colby College[50] (until 1890, when women were resegregated into separate classes)[34] University of Michigan[51] University of Nebraska-Lincoln[34] Pennsylvania State University[52] Syracuse University[3] University of Vermont |
| 1872 | University of Akron (at that time "Buchtel College") University of Maine[34] University of Washington (co-ed secondary classes began in 1861; the school was closed at various times between 1862 and 1869)[53] Wesleyan University (until 1912, when it became all male once again)[54] |
| 1873 | Ohio State University[34] Texas Christian University |
| 1875 | Purdue University [55] |
| 1876 | University of Oregon[34] University of Pennsylvania (women not admitted to degree-granting programs until 1880)[56] |
| 1877 | Ohio Wesleyan University[57] University of Colorado at Boulder[34] |
| 1878 | Hope College |
| 1880 | Emerson College University of Southern California |
| 1881 | Coe College Hendrix College |
| 1882 | University of South Dakota |
| 1883 | Bucknell University[45] Florida State University (The school was a coeducational seminary beginning in 1858, and was chartered as a coeducational university in 1883. However, in 1905, a reorganization of the state's higher education system converted what was then Florida State College to a women's school. It returned to coeducation in 1947, adopting its current name at that time.)[58] Middlebury College University of Texas |
| 1884 | University of North Dakota[34] |
| 1885 | University of Mississippi |
| 1886 | University of Nevada, Reno[34] |
| 1887 | Baylor University Pomona College Stetson University (co-ed secondary classes began in 1883) University of Wyoming[34] |
| 1888 | George Washington University Guilford College (co-ed secondary classes began in 1837; it became a college in 1888)[59] University of Kentucky Pomona College Tulane University Pharmaceutical School |
| 1889 | West Virginia University[60] |
| 1891 | University of Arizona[34] College of Idaho Stanford University |
| 1892 | Auburn University University of Chicago (women resegregated into separate classes in 1902 for their first two years)[34] University of New Mexico[34] University of Oklahoma[34] |
| 1893 | University of Alabama[34] University of Connecticut Johns Hopkins University Graduate School Macalester College[61] University of Tennessee |
| 1894 | Boalt Hall[62] |
| 1895 | Beloit College University of Montana[34] University of Pittsburgh University of South Carolina |
| 1897 | University at Buffalo Law School University of North Carolina at Chapel Hill (graduate students) |
| 1899 | Eastern Michigan University (co-ed classes in the "Normal school" began 1852; chartered as college in 1899) |