Mattar is an Arabic surname. People with that name include:
- Ahmad Mattar, Singapore Former Minister of Environment
- Mattar (Brazilian footballer), full name Antônio Mattar Neto, Brazilian football forward
- Ali Mattar (born 1963), member of Bahrain's parliament
- Haitham Mattar, Lebanese-American business executive
- Hassan Mattar, (born 1956), a Qatari former striker
- Luiz Mattar, Brazilian tennis player
- Malak Mattar, Palestinian painter
- Maurício Mattar, (born 1964) is a Brazilian actor
- Philip Mattar, (born 1944), Palestinian-American historian
- Spiridon Mattar (1921 – 2014), Melkite Greek Catholic Church leader
