Nelio is a name. Notable people with the name include:
Given name Nélio José Nicolai (1940-2017), Brazilian electrotechnician who invented caller ID Nélio (footballer, born 1943), full name Nélio dos Santos Pereira, Brazilian football midfielder Nelio Dallolio (fl. 1948-1950), American college football head coach Nélio (footballer, born 1971), full name Nélio da Silva Melo, Brazilian football midfielder
Surname Daniel López Nelio (1949-2004), Mexican politician