| 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 |
| Ipomoea lobata (Cerv.) Thell., 1919 |
| Ipomoea longicuspis Meisn., 1869 |
| Ipomoea longifolia Benth., 1839 |