Ulf Selmer (December 10, 1885 – September 24, 1961) was a Norwegian actor and painter.

Selmer debuted at the Central Theater in 1904; he was in the National Tour (Nationalturneen) traveling ensemble of Ludovica Levy (1856–1922) for one year before he was at the Fahlstrøm Theater for one year.

In 1911 he moved to the newly opened Trondheim National Theater, where he remained until 1918.

He made his debut in Den nye lensmannen in 1926, which was directed by Leif Sinding.

Selmer was a skilled painter, and some of his works are displayed in the Oslo City Museum.