Rongga is a language of central Flores, in East Nusa Tenggara Province, Indonesia. Rongga is closely related to Ngadha, and more distantly to Manggarai.
Locally, it is considered part of the Manggarai culture, however its closer linguistic relatives include Ngadha and Lio, both belonging to the Central Flores subgroup. Typologically, it is an isolating language. Like other Central Flores languages, it uses a base-5 numeral system, possibly exhibiting the influence of a hypothetical Papuan linguistic substratum.
When written, it is spelled with Indonesian-like orthographic conventions. Digraphs such as zh, dh and bh are used to record sounds specific to this language.