Back in November, we assessed the top 16 fastest-growing large micropolitan areas in the United States. In case you need a refresher, a micropolitan area is defined by the Office of Management and Budget as a labor market area in the U.S. centered on a city with a population of at least 10,000 but fewer than 50,000 people. This is opposed to a metropolitan area, which has at least one city with a population of 50,000 or higher.