Dahlman is a surname of Swedish origin. Notable people with the surname include:

• Albert Gustaf Dahlman (1848–1920), Swedish executioner
• Cecilia Dahlman (born 1968), retired Swedish tennis player
• Gustaf Dahlman (born 1997), Swedish swimmer
• Hjalmar Reinhold Dahlman (1909-1993), Canadian politician
• James Dahlman (1856–1930), American politician
• Jenni Dahlman (born 1981), Finnish model
• Lasse Dahlman (1931–1975), Finnish sailor
• Nanne Dahlman (born 1970), Finnish tennis player
• Noah Dahlman (born 1989), American basketball player
• Peter Dahlman (born 1960), Norwegian curler and coach
• Toni Dahlman (born 1979), Finnish ice hockey player

• Dahlman neighborhood, Omaha, Nebraska, US
• Dahlmann, a surname