| Ipomoea igualensis Weath., 1910 |
| Ipomoea imperati (Vahl) Griseb., 1866 |
| Ipomoea indica (Burm.) Merr., 1917 |
| Ipomoea indica var. variabilis (Schltdl. & Cham.) L.O. Williams, 1970 |
| Ipomoea intrapilosa Rose, 1894 |
| Ipomoea invicta House, 1908 |
| Ipomoea iodantha Brandegee, 1913 |
| Ipomoea jacalana Matuda, 1965 |
| Ipomoea jalapa (L.) Pursh, 1813 |
| Ipomoea jicama Brandegee, 1889 |
| Ipomoea kahloae Gonz.-Martínez, Lozada-Pérez & Rios-Carr., 2018 |
| Ipomoea kruseana Matuda, 1966 |
| Ipomoea laeta A. Gray, 1887 |
| Ipomoea lambii Fernald, 1895 |
| Ipomoea lenis House, 1908 |
| Ipomoea leonensis B.L. Rob., 1891 |
| Ipomoea leptotoma Torr., 1859 |
| Ipomoea leucotricha Donn. Sm., 1897 |
| Ipomoea lindenii M. Martens & Galeotti, 1845 |
| Ipomoea lindheimeri A. Gray, 1878 |