Miami is a city in and the county seat of Ottawa County, Oklahoma, United States, founded in 1891. Lead and zinc mining were established by 1918, causing the area's economy to boom.

Ottawa County is a county located in the northeastern corner of the U.S. state of Oklahoma. As of the 2020 census, the population was 30,285. Its county seat is Miami. The county was named for the Ottawa Tribe of Oklahoma. It is also the location of the federally recognized Modoc Nation and the Quapaw Nation, which is based in Quapaw.