Bert Kalmar (16 February 1884 - 18 September 1947) was a popular United States songwriter, born in New York City.

Kalmar worked mostly as a lyricist. Many of his most famous songs were written in collaboration with Harry Ruby. He sometimes worked with other songwriters as well, including Oscar Hammerstein II and Ted Snyder.

Kalmar is also credited with writing some melodies, and wrote or co-wrote some Broadway theater play scripts, especially musical comedy.

Bert Kalmar worked in Tin Pan Alley, and wrote for movies and some early television.

Kalmar's hits include Give Me A Kiss To Build A Dream On; Mine, All Mine; Three Little Words; and Who's Sorry Now?.

He died in Los Angeles, California.

Bert Kalmar is an inductee of the Songwriters Hall of Fame.