|Census Class & Code
|Incorporated Places - C1
|An active incorporated place that does not serve as a county subdivision equivalent.
|Incorporated Places - C5
|An active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent.
|Incorporated Places - C9
|An inactive or nonfunctioning incorporated place.
|American Indian Areas - D1
|Legal federally recognized American Indian area consisting of reservation and associated off-reservation trust land.
|American Indian Areas - D2
|Legal federally recognized American Indian area consisting of reservation only.
|Counties and County Equivalents - H1
|An active county or equivalent feature.
|Counties and County Equivalents - H6
|A county that is coextensive with an incorporated place, part of an incorporated place, or a consolidated city and the governmental functions of the county are part of the municipal govenment.
|Inactive or Nonfunctioning Primary County Divisions - Z1
|A nonfunctioning county subdivision.
|Land Grants & Other - N/A
|Land Grants and Other Unclassified Civil Features