Luo may refer to:
- Luo peoples, an ethno-linguistic group of eastern and central Africa
- Luo people of Kenya and Tanzania or Joluo, an ethnic group in western Kenya, eastern Uganda, and northern Tanzania
- Luoland, the tribal homeland of the group immediately above
- Luo people of Kenya and Tanzania or Joluo, an ethnic group in western Kenya, eastern Uganda, and northern Tanzania
- Luo languages, a dozen languages spoken by the Luo peoples
- Luo language or Dholuo, a language spoken in Kenya and Tanzania
- Southern Luo, a dialect cluster of Uganda and neighboring countries
- Luo language (Cameroon), a nearly extinct language of Cameroon - not associated with Lou languages above
- Luo Scientific Reserve, a protected area in the Democratic Republic of the Congo
- Luo (instrument), a type of Chinese gong
- Luo, a character in the novel Balzac and the Little Chinese Seamstress by Dai Sijie
- People
- Luo (surname) or 羅, a Chinese surname
- Jing Jing Luo, Chinese composer
- Genecia Luo, Singaporean pageant coach
- Michael Luo (born 1976), American journalist
- Show Luo (born 1979), Taiwanese singer, dancer and actor
- See also
- Luo River, in China
- LUO, the IATA abbreviation for Luena Airport in Angola