Dainis is a masculine Latvian given name. Notable people with the name include:
Dainis Bremze (born 1954), Latvian luger Dainis Deglis (born 1959), Latvian footballer Dainis Dukurs (born 1954), Latvian bobsledder Dainis Īvāns (born 1955), Latvian journalist and politician Dainis Krištopāns (born 1990), Latvian handball player Dainis Kūla (born 1959), Latvian javelin thrower Dainis Ozols (born 1966), Latvian cyclist Dainis Turlais (born 1954), Latvian politician Dainis Upelnieks (born 1982), Latvian sports shooter