WILLISTON, N.D. (AP) — A city in the heart of the North Dakota oil patch has a new brand.

The Williston Convention and Visitor's Bureau unveiled the "Boomtown USA" theme on Thursday. CVB executive director Amy Krueger says the idea is meant to "boldly embrace" the city's future.

The city has some of its earliest roots as a boomtown, when the fur trading business exploded in 1828. That's also when Fort Union opened its doors.

The latest oil boom has allowed Williston to more than double in population in the past three years.

Recent U.S. Census Bureau estimates show that Williston, in the far northwestern corner of the state, is the fastest-growing micropolitan area in the country. A micropolitan area is one with a population of 10,000 to 49,999 people.

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