Metropolitan and micropolitan statistical areas (metro and micro areas) are geographic entities delineated by the Office of Management and Budget (OMB) for use by federal statistical agencies in collecting, tabulating, and publishing federal statistics. The term “Core Based Statistical Area” (CBSA) is a collective term for both metro and micro areas. A metro area contains a core urban area of 50,000 or more population, and a micro area contains an urban core of at least 10,000 (but less than 50,000) population. Each metro or micro area consists of one or more counties and includes the county or counties containing the core urban area, as well as any adjacent counties that have a high degree of social and economic integration with the urban core. Social and economic integration are measured by commuting to work data.
The standards for delineating the areas are reviewed and revised once every ten years, prior to each decennial census. Generally, the areas are delineated using the most recent set of standards following each decennial census. Between censuses, the delineations are updated to reflect Census Bureau population estimates. Areas based on the 2010 standards and Census Bureau data were delineated in February of 2013, and updated in July of 2015. (Definition Source: U.S. Census Bureau)
Origins of the current geographic definitions can be traced back to the Standard Metropolitan Areas presented in the 1950 decennial census products. Although the terminology and geographic areas have changed over time, all of these define geographic areas that contain a populous and concentrated core and outlying areas having a high degree of economic integration with the core.
The metro and micro delineations are created for statistical or analytical purposes and are not designed to be used in the federal budgeting process. In practice, however, many local and regional entities use metro and micro area data for a wide range of analyses that inform public and private programs, policies, and investments.
There are five metro and five micro areas in Utah. The metro areas include Logan (Cache County and Franklin County, ID); Ogden-Clearfield (Box Elder, Weber, Morgan, and Davis Counties); Provo-Orem (Utah and Juab Counties); Salt Lake City (Salt Lake and Tooele Counties); and St. George (Washington County). The micro areas include Cedar City (Iron County); Heber (Wasatch County); Price (Carbon County); Summit Park (Summit County); and Vernal (Uintah County). In Utah, ten counties belong to a metro area, five counties belong to a micro area, and the remaining fourteen counties do not belong to any metro or micro area.
Utah also contains one Combined Statistical Area (CSA), the Salt Lake City-Provo-Orem CSA. A CSA consists of two or more adjacent Core Based Statistical Areas (CBSAs) that have substantial employment interchange. The CSA includes ten counties; eight counties belong to metro areas (Ogden-Clearfield, Salt Lake City, and Provo-Orem) and two counties belong to micro areas (Heber and Summit Park).
Utah Metropolitan and Micropolitan Statistical Area Map
USA Metropolitan and Micropolitan Statistical Area Map
Metropolitan and Micropolitan Statistical Area Estimates: 2015
Historical Statistical Area Delineations
More information can be found here.