1. Urban expansion is a major threat to diversity, especially in rapidly developing tropical countries where urban areas are growing at great pace and protection is limited.2. We conducted a systematic review of published research on the ecology of lentic habitats in tropical urban areas. The review focused on understanding: (1) how much is currently known about the biodiversity of these habitats; (2) whether this knowledge is biased towards certain taxonomic groups and/or geographic areas;(3) what is known about the factors influencing their diversity; and (4) which ecosystem services urban lentic habitats provide. The review aimed to establish whether existing knowledge is sufficient to help guide conservation and provide evidence to policy makers of the importance of conserving tropical urban wetlands.3. We found 64 papers that addressed questions about the diversity and/or distribution of lentic ecosystems within tropical urban areas. Papers came from 15 countries, although almost half (45%) were from India; relatively few countries from Southeast Asia, tropical Africa, or South America were represented in the literature.