Rosier is a surname. Notable people with the surname include:

• A. J. Rosier (1880–1932), American politician
• Andrée Rosier (born 1978), French chef
• Bertie Rosier (1893–1939), English footballer
• Bruce Rosier (1928–2019), Australian Anglican bishop
• Cathy Rosier (1945–2004), Martiniquaise model and actress
• Diego Rosier (born 1994), South African cricketer
• Evan Rosier, fictional character in the Harry Potter universe
• Frederick Rosier (1915–1998), Welsh Royal Air Force commander
• Jacqueline Beaugé-Rosier (1932–2016), Haitian–Canadian educator and writer
• James Rosier (1573–1609), English explorer
• Jean-Louis Rosier (1925–2011), French racing driver
• Joan Rosier-Jones (born 1940), New Zealand writer and teacher
• Joseph Rosier (1870–1951), American politician
• Joseph-Bernard Rosier (1804–1880), French playwright and librettist
• Kevin Rosier (1962–2015), American kickboxer, boxer and mixed martial artist
• Louis Rosier (1905–1956), French racing driver
• Malik Rosier (born 1995), American football player
• Michel Rosier (1951-2004), a French historian of economics
• Michèle Rosier (1930–2017), French fashion journalist and designer
• Pat Rosier (1942–2014), New Zealand writer, editor and feminist activist
• Raymond Rosier (1924–1961), Belgian Olympic runner
• Trevor Rosier (born 1943), English cricketer
• Valentin Rosier (born 1996), French footballer

See also

• Roger Rosiers (born 1946), Belgian racing cyclist
• Desrosiers, a surname (including a list of people with the name)
• Roser (name), a surname and a given name (including lists of people with the name)
• Rosier (disambiguation)