Columbian is the adjective form of Columbia.
Columbian can refer to:
- Columbian High School (Tiffin, Ohio)
- The Columbian, the U.S. daily newspaper published in Vancouver, Washington
- The Columbian Orator, a collection of political essays, poems, and dialogues
- The Columbian Theatre, a music hall in northeastern Kansas
- Columbian Sharp-tailed Grouse
- Anything pertaining to the Knights of Columbus, (i.e. Columbian values)
Historically, Columbian also can refer to:
- American (word), or an early alternative name for inhabitants of the United States
- Columbian Issue, a set of U.S. postage stamps marking the 1893 World Columbian Exposition
- Columbian (B&O train), a passenger train operated by Baltimore and Ohio Railroad until 1971
- Columbian (MILW train), a passenger train which operated from 1911 to 1955
- World's Columbian Exposition, held in Chicago, Illinois, in 1893
- The Columbian, a sternwheeler lost in the worst accident in the Yukon River's history in 1906