Ōmeteōtl is a name used to refer to the pair of Aztec deities Ometecuhtli and Omecihuatl, also known as Tōnacātēcuhtli and Tonacacihuatl. Ōme translates as "two" or "dual" in Nahuatl and teōtl translates as "god". The existence of such a concept and its significance is a matter of dispute among scholars of Mesoamerican religion. Ometeotl was one as the first divinity, and Ometecuhtli and Omecihuatl when the being became two to be able to reproduce all creation.

In Aztec mythology, Tonacatecuhtli was a creator and fertility god, worshipped for populating the earth and making it fruitful. Most Colonial-era manuscripts equate him with Ōmetēcuhtli. His consort was Tonacacihuatl.