Office of Management and Budget in the context of "Micropolitan Statistical Area"

In the United States, a principal city is the largest incorporated place with a population of at least 10,000 in a core-based statistical area (CBSA) or New England city and town area (NECTA), or if no incorporated place of least 10,000 population is present in the CBSA or NECTA, the largest incorporated place or census designated place (CDP) in the CBSA or NECTA. Additional places that meet specific criteria are also identified as principal cities. The title of each metropolitan or micropolitan statistical area consists of the names of up to three of its principal cities and the name of each state into which the metropolitan or micropolitan statistical area extends.

In the United States and Puerto Rico, the Office of Management and Budget identifies principal cities for each core-based statistical area (CBSA) and New England city and town area (NECTA). Principal cities are used primarily for naming CBSAs and NECTAs, as well as combined statistical areas and combined NECTAs.

A core-based statistical area (CBSA) is a U.S. geographic area defined by the Office of Management and Budget (OMB). It contains a large population nucleus, or urban area, and adjacent communities that have a high degree of integration with that nucleus.

On July 15, 2015, the OMB released new standards based on the 2010 census. These standards are used to replace the definitions of metropolitan areas from the 2010 United States census data.

The Washington–Baltimore combined metropolitan statistical area is a statistical area, including the overlapping metropolitan areas of Washington, D.C. and Baltimore. The region includes Central Maryland, Northern Virginia, three counties in the Eastern Panhandle of West Virginia, and one county in south-central Pennsylvania. It is the most educated, highest-income, and third-most populous combined statistical area in the United States behind New York City–Newark, NJ and Los Angeles–Long Beach.

The area is designated by the Office of Management and Budget (OMB) as the Washington–Baltimore–Arlington, DC–MD–VA–WV–PA Combined Statistical Area. It is composed primarily of two major metropolitan statistical areas (MSAs), the Washington–Arlington–Alexandria, DC–VA–MD–WV MSA and the Baltimore–Columbia–Towson, Maryland Metropolitan Statistical Area. Five smaller urban areas not contiguous to the main urban area but having strong commuting ties with the main area are included in the metropolitan area:Hagerstown–Martinsburg, Maryland–West Virginia MSA, the Chambersburg–Waynesboro, Pennsylvania MSA, the Winchester, VA–WV MSA, the California–Lexington Park, Maryland MSA, and the Easton, Maryland micropolitan statistical area (μSA).

Metro Detroit is a major metropolitan area in the U.S. state of Michigan, consisting of the city of Detroit and over 200 municipalities in the surrounding area. There are varied definitions of the area, including the official statistical areas designated by the Office of Management and Budget, a federal agency of the United States.

Metro Detroit is known for its automotive heritage, arts, entertainment, popular music, food, cultural diversity, and sports. The area includes a variety of natural landscapes, parks, and beaches, with a recreational coastline linking the Great Lakes. Metro Detroit also has one of the largest metropolitan economies in the U.S. with 17 Fortune 500 companies.

The Miami metropolitan area, officially known as the Miami–Fort Lauderdale–West Palm Beach Metropolitan Statistical Area, is a coastal metropolitan area in southeastern Florida. It is the sixth-largest metropolitan statistical area (MSA) in the United States, the third-largest metropolitan area in the Southern United States, and the largest metropolitan area in Florida. It is also known as South Florida, SoFlo, SoFla, the Gold Coast, Southeast Florida, the Tri-County Area, or Greater Miami. With a population of 6.45 million, its population exceeds 31 of the nation's 50 states as of 2023. It comprises the three most populated counties in the state, Miami-Dade County, Broward County, and Palm Beach County. Miami-Dade County, with 2,701,767 people in 2020, is the seventh-most populous county in the United States.

Miami is the region's financial and cultural core and most populous city. According to the Global and World Cities Research Network (GaWC) classification Miami is an "Alpha minus" city and is considered a very important world city that links the major economic region of South Florida into the world economy. The Global Financial Centres Index (GFCI 37) ranked Miami as the world's 26th most important finance center as of May 2025, ranking 7th in the United States only behind New York, San Francisco, Chicago, Los Angeles, Washington D.C. and Boston. Other principal cities, as defined by the Office of Management and Budget, include Fort Lauderdale, West Palm Beach, Pompano Beach, Boca Raton, Sunrise, Deerfield Beach, Miami Beach, Kendall, Doral, Delray Beach, Jupiter, and Palm Beach Gardens. The Miami metropolitan area is part of the larger South Florida region of the state, which also includes the Everglades and the Florida Keys.

The Baltimore–Columbia–Towson Metropolitan Statistical Area, also known as Central Maryland, is a metropolitan statistical area (MSA) in Maryland as defined by the United States Office of Management and Budget (OMB). It is part of the larger Washington–Baltimore combined statistical area. As of 2022, the combined population of the seven counties is 2,985,871, making it the 20th-largest metropolitan statistical area in the nation.

The area has the fourth-highest median household income in the United States, at $66,970 as of 2012.