Atli is an Old Norse masculine personal name, and may refer to:
People
- Atli the Slender, a 9th-century earl of Sogn, Norway
- Atli Viðar Björnsson (born 1980), Icelandic footballer
- Atli Dam (1932–2005), five-time prime minister of the Faroe Islands
- Atli Gíslason (born 1947), Icelandic politician
- Atli Guðnason (born 1984), Icelandic footballer
- Atli Þór Héðinsson (born 1953), Icelandic former footballer
- Atli Örvarsson (born 1970), Icelandic film score composer
- Atli Heimir Sveinsson (born 1938), Icelandic composer
Fictional or mythological characters
- Atli, Attila in Old Norse legendary literature
- Atli, one of the names of the Norse god Thor
- Atli, in Helgakviða Hjörvarðssonar, a poem in the Poetic Edda
- Atli Buðlason, a character in the heroic poems in the Poetic Edda and in Völsunga saga, believed to be a romanticized version of Attila the Hun
- Atli, a character in Marvel comics
- Atli Hringsson
- Atli Iðmundsson