Rio de Contas is a municipality in the Bahia state, in the eastern part of Brazil.

In 1718 the town of Santo Antônio de Mato Grosso was founded.

It was later elevated to the status of municipality in 1773, with the designation of Vila Nova de Nossa Senhora do Livramento das Minas do Rio de Contas.

Rio de Contas is home to numerous colonial-period historic structures, many designated as Brazilian national monuments.

The historic center of Rio de Contas (Conjunto Arquitetônico da Cidade de Rio de Contas) was designated a national monument by the National Institute of Historic and Artistic Heritage (IPHAN).