| Tillandsia porvenirensis Ehlers, 2015 |
| Tillandsia pumila Lindl. & Paxton, 1865 |
| Tillandsia pungens Mez, 1896 |
| Tillandsia purpusii Mez, 1916 |
| Tillandsia quadrangularis M. Martens & Galeotti, 1843 |
| Tillandsia queretaroensis Ehlers, 2017 |
| Tillandsia ramosa Sweet, 1827 |
| Tillandsia rayonesensis Ehlers, 1990 |
| Tillandsia rhodochlamys Baker, 1889 |
| Tillandsia rothschuhiana Mez, 1902 |
| Tillandsia rubentifolia Poiss. & Menet, 1908 |
| Tillandsia santiago-tuxtlensis Matuda, 1977 |
| Tillandsia schatzlii Rauh, 1979 |
| Tillandsia schlechtendalii Baker, 1888 |
| Tillandsia schlumbergeri E. Morren ex André, 1894 |
| Tillandsia scopus Hook. f., 1871 |
| Tillandsia serrata Sessé & Moc., 1894 |
| Tillandsia sessiliflora Ruiz & Pav., 1802 |
| Tillandsia simplexa Matuda, 1972 |
| Tillandsia sintenisii Baker, 1888 |