Üllar is an Estonian masculine given name.
People named Üllar include: Üllar Jörberg (1941–2018), singer Üllar Kerde (born 1954), basketball coach Vahur-Üllar Kersna (born 1962), journalist Üllar Peterson, historian Üllar Põld (born 1962), actor and alpinist Üllar Saaremäe (born 1969), actor and theatre director
See also Ullar (Heroscape), a general in the game HeroScape