Roosa, could refer to:
People Roosa Koskelo, Finnish volleyball player Roosa Timonen, Finnish tennis player Daniel Bennett St. John Roosa, American physician Robert Roosa, American economist and banker Stuart Roosa, NASA astronaut
Places Rõõsa, a village in Kose Parish, Harju County in northern Estonia Röösa, a village in Saaremaa Parish, Saare County in western Estonia Vana-Roosa (locally known as Roosa), a settlement in Rõuge Parish, Võru County in southeastern Estonia Vastse-Roosa, a village in Rõuge Parish, Võru County in southeastern Estonia
Fictional characters General Manie Roosa, a character in James Rollins and Grant Blackwood's novel The Kill Switch (2014), who their epilogue states is "very loosely based on the real-life Boer leader Manie Maritz"