| Country: | Colombia |
| National Leftist Revolutionary Union | |
| Native Name: | Unión Nacional Izquierdista Revolucionaria |
| Abbreviation: | UNIR |
| President: | Jorge Eliécer Gaitán |
| Foundation: | 1933 |
| Split: | Liberal Party |
| Dissolution: | 1935 |
| Merged: | Liberal Party |
| Ideology: | Left-wing nationalism Left-wing populism Democratic socialism Anti-imperialism |
| Position: | Left-wing |
| Colorcode: | red |
The National Leftist Revolutionary Union (Spanish; Castilian: Unión Nacional Izquierdista Revolucionaria) was a radical political party that operated in Colombia in the early 1930s.
The movement was founded in 1933 by populist leader Jorge Eliécer Gaitán after he broke with the Liberal Party. In 1935, Gaitan decided to rejoin the Liberals, and disbanded the National Leftist Revolutionary Union in the same year.[1]