Use thousandth in a sentence. 1  coming last in a series of a thousand; 1,000th. 2  designating any of the thousand equal parts of something.
For other uses, see Brigham City (disambiguation). Brigham City is a city in Box Elder County, Utah, United States. The population was 17,899 at the 2010 census. It is the county seat of Box Elder County. It lies on the western slope of the Wellsville Mountains, a branch of the Wasatch Range at the western terminus of Box Elder Canyon.
17.1 Avg. Brigham City is located at the north end of the Wasatch Front corridor begins. The town was settled in the early 1850s and originally named Box Elder. The moniker was changed in January of 1867 to honor Brigham Young, the second president of the Mormon church.