Use this page to look up standard codes for areas grouped into common census geographic summary levels.
Populations are shown in parentheses after each area on the list. All population data are from the 2014-2018 American Community Survey.
Most codes are linked to a page that lists multiple data sources for the selected area.
Metro/micro areas, CSAs, and urban areas may cross state borders. Similarly, places (cities) and county subdivisions may cross county lines. In such cases, the population shown is only that portion within the selected state or county. For example, Kansas City, MO-KS Metro Area is listed under both Missouri and Kansas with each states' respective share of the total.