| Croton trichocarpus Torr., 1858 |
| Croton trilobatus Forssk., 1775 |
| Croton trinitatis Millsp., 1900 |
| Croton triumfettoides Croizat, 1940 |
| Croton tuerckheimii Donn. Sm., 1912 |
| Croton varelae V.W. Steinm., 2000 |
| Croton verapazensis Donn. Sm., 1912 |
| Croton verticillatus Sessé & Moc., 1890 |
| Croton virletianus Müll. Arg., 1865 |
| Croton vitifolius Lundell, 1942 |
| Croton watsonii Standl., 1923 |
| Croton websteri Mart. Gord. & J. Jiménez Ram., 1990 |
| Croton wigginsii L.C. Wheeler, 1939 |
| Croton wilburii McVaugh, 1961 |
| Croton wilsonii Griseb., 1859 |
| Croton xalapensis Kunth, 1817 |
| Croton yecorensis V.W. Steinm. & Felger, 1998 |
| Croton ynesiae Croizat, 1940 |
| Croton yucatanensis Lundell, 1940 |
| Croton zavaletae Conz.ex Rzed., 1988 |