Moacyr, also spelled Moacir, is a Brazilian masculine given name.
Notable people with the name include:
- Moacir Barbosa Nascimento (1921–2000), nicknamed Barbosa, Brazilian footballer
- Moacyr Claudino Pinto da Silva (born 1936), nicknamed Moacir or Moacyr, Brazilian former footballer
- Moacir Costa da Silva (born 1986), nicknamed Moacir, Brazilian footballer
- Moacyr Brondi Daiuto (1915–1994), Brazilian basketball coach
- Moacyr Filho Domingos Demiquei (born 1981), nicknamed Moacyr Filho or Nenê, Brazilian footballer
- Moacyr Grechi OSM (1936–2019), Brazilian Roman Catholic archbishop
- Moacyr José Vitti CSS (1940–2014), Roman Catholic archbishop
- Moacyr Scliar (1937–2011), Brazilian writer and physician