Kristjan is a masculine given name in the Estonian language and Slovenian language. It is a variation of the name Christian. Notable people named Kristjan include:
Kristjan Čujec (born 1988), Slovenian futsal playerKristjan Fajt (born 1982), Slovenian professional road bicycle racerKristjan Gregorič (born 1989), Slovenian track cyclistKristjan Glibo (born 1982), German football defender and managerKristjan Ilves (born 1996), Estonian Nordic combined skierKristjan Järvi (born 1972), Estonian-American conductorKristjan Niels Julius (1860–1936), Icelandic-American satirical poetKristjan Kais (born 1976), Estonian beach volleyball playerKristjan Kaljurand (born 1992), Estonian male badminton playerKristjan Kangur (born 1982), Estonian basketball playerKristjan Kitsing (born 1990), Estonian basketball playerKristjan Lipovac (born 1989), Slovenian football goalkeeperKristjan Makke (born 1981), Estonian basketball playerKristjan Palusalu (1908–1987), Estonian heavyweight wrestlerKristjan Jaak Peterson (1801–1822), Estonian poetKristjan Prendi (born 1997), Albanian footballerKristjan Rahnu (born 1979), Estonian decathleteKristian Rand (born 1987), Estonian ice dancerKristjan Raud (1865–1943), Estonian painter and drawerKristjan Sarv (born 1979), Estonian actor, director and contemporary artistKristjan Sokoli (born 1991), American football defensive end