Halfdan Christensen (12 December 1873 – 17 September 1950) was a Norwegian stage actor and theatre director.

He had his stage début at Den Nationale Scene in Bergen during 1896.

During the Second World War he had to flee to Sweden, and there he led the theatre Fri norsk scene together with his wife Gerda Ring.

After returning to Norway after the liberation in 1945, he had held various positions at the National Theater.

During the 1920s and 1930s, he had written three plays, all of which were performed at the National Theater, with Christensen as stage director.