Beier is a German surname. Notable people with the surname include:
- Albert Beier (1900–1972), German footballer
- Carol A. Beier, Kansas Supreme Court Justice
- Christina Beier (born 1984), German ice dancer, sister of William Beier
- Emil Beier (1893–1985), German Nazi politician and Mayor of Ostrava, Czechoslovakia
- Eugene Beier (born 1940), American physicist
- Karin Beier (born 1965), German theatre director
- Max Beier (1903–1979), Austrian arachnologist
- Priidu Beier (born 1957), Estonian poet and teacher
- Tom Beier (born 1945), former American football safety
- Ulli Beier (1922–2011), German editor, writer and scholar
- William Beier (born 1982), German ice dancer, brother of Christina Beier