Konstantinos or Constantinos is a Greek masculine given name, and may refer to:
Konstantinos, occultist
Konstantinos "Kosta" Barbarouses, New Zealand footballer
Konstantinos Chalkias, Greek footballer
Konstadinos Gatsioudis, Greek athlete (javelin)
Konstantinos Karamanlis (1907–1998), former Prime Minister and President of Greece
Konstantinos Kenteris, Greek athlete (sprinter) and Olympic gold medalist
Konstantinos Koukodimos, former Greek athlete and politician
Konstantinos Logothetopoulos, former Prime Minister of Greece
Konstantinos Mitroglou, Greek footballer
Konstantinos Mitsotakis (born 1918), former Prime Minister of Greece
Konstantinos Paparrigopoulos (1815–1891), Greek historian
Konstantinos Simitis (born 1936), former Prime Minister of Greece
Konstantinos Stephanopoulos (born 1926), former President of Greece
Konstantinos Tsaldaris, Greek politician
Konstantinos Tsatsos (1899–1987), former President of Greece
Konstantinos Tsiklitiras (1888–1913), Greek athlete and Olympic gold medalist
Konstadinos Zalagitis, Greek athlete (triple jump)
