Bluegrass or Blue Grass may refer to:

• Bluegrass (grass), several species of grasses of the genus Poa
  • Kentucky bluegrass (Poa pratensis), one well-known species of the genus

• Bluegrass music, a form of American roots music
• Bluegrass Films, an independent film studio based in Los Angeles

• Blue Grass, Iowa, a city in the United States
• Blue Grass, Minnesota, an unincorporated settlement in the United States
• Blue Grass, Virginia, an unincorporated settlement in the United States
• Bluegrass region, a geographic region in the US state of Kentucky
• Blue Grass Airport, an airport in Fayette county, Kentucky

• Blue Grass, a 1915 film with Thomas A. Wise
• Blue Grass Army Depot, a munitions storage depot in Richmond, Kentucky
• Blue Grass, a brand name used by Belknap Hardware and Manufacturing Company
• Bluegrass, a passenger train of the Monon Railroad

• All pages with titles beginning with Bluegrass