Bluegrass refers to several species of grasses of the genus Poa (with the most famous being the Kentucky bluegrass)
The term has also been applied to various things that relate to the region in which the grass grows:
- Bluegrass region, a region of the United States centered in Kentucky
- Bluegrass music, a form of American roots music
- The Blue Grass Boys, the band led by Bill Monroe that defined the Bluegrass genre
- Bluegrass & Backroads, a television show about people and places in the Bluegrass region
- Other uses
- Blue Grass, Iowa, a small city
- Blue Grass, Virginia
- Blue Grass Army Depot in Richmond, Kentucky
- Bluegrass (Sirius)
- Bluegrass (train), a passenger train of the Monon Railroad