| Acacia notabilis | Aquilegia formosa var. hypolasia | Genus Arabidopsis | Genus Arabis | Genus Arachis | Genus Arachniodes | Genus Aralia | Genus Araucaria | Genus Araujia |

| Acanthixalus | Aphanopus | Colidotea rostrata | Crenicichla johanna | Halichoeres melanotis | Klopicoris phorodendronae | Laportea canadensis | Leiuranus semicinctus | Nyctophus metopoclampus |

| Tira Sujanpur | Tiradentes | Tirano | Tiraspol | Tiraspolul Nou | Tirat Karmel | Tire | Tiream | Tirebolu | Tireli |

| Tisdale Reservoir | Tisdell Landing | Tishimna Lake | Titicus River | Tittle Mountain | Tiverton Historical Society Building | Tiwappity School (historical) | Tjossem Pond |