Campo Magro is a town and suburb of Curitiba in the state of Paraná, Brazil. It is a very young municipality, and its economy is growing around the road that links Curitiba to Castro, known as "Estrada do Cerne", a two way road. As of 2020, the estimated population was 29,740. Ecotourism is a flourishing industry but its inconsistent growth has encouraged the inhabitants of the city to seek employment at Curitiba. A very important source of income to the town are monthly payments from the federal and state governments for potable water provided to Curitiba.