Óbidos is a municipality in Pará, Brazil located at the narrowest and swiftest part of the Amazon River. The town was founded in 1697, and is located between Santarém and Oriximiná. It is the seat of the Diocese of Óbidos. The town was named after Óbidos, Portugal.

Pará is a state of Brazil, located in northern Brazil and traversed by the lower Amazon River. It borders the Brazilian states of Amapá, Maranhão, Tocantins, Mato Grosso, Amazonas and Roraima. To the northwest are the borders of Guyana and Suriname, to the northeast of Pará is the Atlantic Ocean. The capital and largest city is Belém, which is located at the Marajó bay, near the estuary of the Amazon river. The state, which is home to 4.1% of the Brazilian population, is responsible for just 2.2% of the Brazilian GDP.