Abreu is a common surname of the Portuguese language, namely in Portugal and Brazil, amongst others. It may refer to:
- Abreu (surname), a person with the surname Abreu
- Abreu Camp, a settlement within Philmont Scout Ranch, New Mexico, USA
- Abreu e Lima, Pernambuco, municipality in the state of Pernambuco, Brazil
- Abreu Vineyards, a winery in Napa Valley, USA
- Bento de Abreu, municipality in the state of São Paulo, Brazil
- Casimiro de Abreu Esporte Clube, Brazilian football team
- Casimiro de Abreu, Rio de Janeiro, municipality in the state of Rio de Janeiro, Brazil
- Estádio Bento de Abreu, multi-use stadium in Marília, Brazil
- University "Marta Abreu" of Las Villas, university located in Santa Clara, Cuba
- Viagens Abreu, the world’s oldest travel agency, as well as the largest travel organization in Portugal
- Abreugraphy, or chest photofluorography, a photofluorography technique for mass screening for tuberculosis