Fall River is a city in Bristol County, Massachusetts, United States. Fall River's population was 94,000 at the 2020 United States census, making it the tenth-largest city in the state. It straddles part of the Massachusetts and Rhode Island state line with Tiverton, RI to its south.

Bristol County is a county in the Commonwealth of Massachusetts. As of the 2020 census, the population was 579,200. The shire town is Taunton. Some governmental functions are performed by the Commonwealth of Massachusetts, others by the county, and others by local towns and cities.