| Code | Title | Definition |
|---|---|---|
| A1 | Airports | Airport with scheduled commercial flights that also serves as a military installation. |
| A3 | Airports | Airport with scheduled commercial flights that does not serve as a military installation. |
| A4 | Airports | Airport without scheduled commercial flights that does not serve as a military installation. |
| A6 | Airports | Airport without scheduled commercial flights located within a military installation. |
| B0 | Post Office - NCOLE | Post Offices Not Corresponding to Other Locational Entities. |
| C1 | Incorporated Places | An active incorporated place that does not serve as a county subdivision equivalent. |
| C2 | Incorporated Places | An active incorporated place legally coextensive with a county subdivision but treated as independent of any county subdivision. |
| C3 | Incorporated Places | A consolidated city. |
| C4 | Incorporated Places | An active incorporated place with an alternate official common name. |
| C5 | Incorporated Places | An active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. |
| C6 | Incorporated Places | An active incorporated place that partially is independent of any county subdivision and serves as a county subdivision equivalent or partially coextensive with a county subdivision but treated as independent of any county subdivision. |
| C7 | Incorporated Places | An incorporated place that is independent of any county. |
| C8 | Incorporated Places | The balance of a consolidated city excluding the separately incorporated place(s) within that consolidated government. |
| C9 | Incorporated Places | An inactive or nonfunctioning incorporated place. |
| D0 | American Indian Areas | Statistical or legal area administered and/or claimed by two or more American Indian tribes. |
| D1 | American Indian Areas | Legal federally recognized American Indian area consisting of reservation and associated off-reservation trust land. |
| D2 | American Indian Areas | Legal federally recognized American Indian area consisting of reservation only. |
| D3 | American Indian Areas | Legal federally recognized American Indian area consisting of off-reservation trust land only. |
| D4 | American Indian Areas | Legal state-recognized American Indian area. |
| D6 | American Indian Areas | Statistical American Indian area defined for a federally recognized tribe that does not have a reservation or off-reservation trust land specifically a tribal designated statistical area or Oklahoma tribal statistical area, but excluding Alaska Native village statistical areas. |
| D7 | American Indian Areas | A tribal subdivision. |
| D9 | American Indian Areas | Statistical American Indian area defined for a state-recognized tribe that does not have a reservation or off-reservation trust land, specifically a state-designated tribal statistical area. |
| E1 | Alaska Native Areas | Statistical area that represents the densely settled portion of an Alaska Native village; an Alaska Native village statistical area. |
| E7 | Alaska Native Areas | An Alaska Native Regional Corporation. |
| F1 | Native Hawaiian Areas | Legal Hawaiian home land consisting of lands held in trust for the benefit of Native Hawaiians. |
| H1 | Counties and County Equivalents | An active county or equivalent feature. |
| H4 | Counties and County Equivalents | An inactive county or equivalent feature. |
| H5 | Counties and County Equivalents | A statistical county equivalent feature. |
| H6 | Counties and County Equivalents | 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. |
| M1 | Federal Facilities | A military or other defense installation that is partially within a census designated place. |
| M2 | Federal Facilities | A military or other defense installation entirely within a census designated place. |
| M3 | Federal Facilities | Health care facility. |
| M4 | Federal Facilities | Federally managed park, forest, or other area. |
| M9 | Federal Facilities | Federal facility not classified elsewhere. |
| P1 | Populated - Incorporated Place | Populated Place that is also an incorporated place with the same name and the same Census Code. |
| T1 | Active Minor Civil Divisions | An active county subdivision that is not coextensive with an incorporated place. |
| T2 | Active Minor Civil Divisions | An active county subdivision that is coextensive with a census designated place. |
| T5 | Active Minor Civil Divisions | An active county subdivision that is coextensive with an incorporated place. |
| T9 | Inactive Minor Civil Divisions | An inactive county subdivision. |
| U1 | Populated (Community) Place | A census designated place with an official federally recognized name. |
| U2 | Populated (Community) Place | A census designated place without an official federally recognized name. |
| U3 | Populated (Community) Place | Alternate official common name for an incorporated or census designated place. |
| U4 | Populated (Community) Place | Official common name for a populated location within an incorporated place |
| U5 | Populated & Census Designated Place | Populated Place that is also a census designated place with the same name. |
| U6 | Populated (Community) Place | A populated place that is not a census designated or incorporated place having an official federally recognized name. |
| X0 | Obsolete or Incorrect Name | Deleted feature that was a non-governmental entity. |
| X1 | Obsolete or Incorrect Name | Deleted feature that was a governmental entity. |
| Z1 | Inactive or Nonfunctioning Primary County Divisions | A nonfunctioning county subdivision. |
| Z3 | Inactive or Nonfunctioning Primary County Divisions | A county subdivision defined as an unorganized territory. |
| Z4 | Inactive or Nonfunctioning Primary County Divisions | A nonfunctioning or disorganized historical county subdivision no longer recognized by the Census Bureau. |
| Z5 | Inactive or Nonfunctioning Primary County Divisions | A statistical county subdivision. |
| Z6 | Inactive or Nonfunctioning Primary County Divisions | A sub-minor civil division. |
| Z8 | Inactive or Nonfunctioning Primary County Divisions | A county subdivision that is legally coextensive with all or part of an incorporated place that the Census Bureau does not recognize. |