犹他-阿兹特克语系（Uto-Aztecan languages）是一个美洲原住民语言的语系。犹他-阿兹特克语系主要分布在北美大盆地地区（Great Basin）的美国奥勒冈州、爱达荷州、犹他州、加州、内华达州、亚利桑那州等地，且一直分布到墨西哥。“犹他（Utah）”这个名称是源自属于犹他-阿兹特克语系的犹特（Ute）族原住民。阿兹特克人的语言古典纳瓦特尔语及现代的各种纳瓦特尔语也属于犹他-阿兹特克语系。

Uto-Aztecan or Uto-Aztekan /ˈjuːtoʊ.æzˈtɛkən/ is a Native American language family consisting of over 30 languages. Uto-Aztecan languages are found almost entirely in the Western United States and Mexico. The name of the language family was created to show that it includes both the Ute language of Utah and the Aztecan languages of Mexico.