| 2021-01-01 | 010 | us | |
| 2021-01-01 | 020 | region | |
| 2021-01-01 | 030 | division | |
| 2021-01-01 | 040 | state | |
| 2021-01-01 | 050 | state› county | |
| 2021-01-01 | 060 | state› county› county subdivision | |
| 2021-01-01 | 160 | state› place | |
| 2021-01-01 | 230 | state› alaska native regional corporation | |
| 2021-01-01 | 250 | american indian area/alaska native area/hawaiian home land | |
| 2021-01-01 | 310 | metropolitan statistical area/micropolitan statistical area | |
| 2021-01-01 | 312 | metropolitan statistical area/micropolitan statistical area› state (or part)› principal city (or part) | |
| 2021-01-01 | 314 | metropolitan statistical area/micropolitan statistical area› metropolitan division | |
| 2021-01-01 | 330 | combined statistical area | |
| 2021-01-01 | 335 | combined new england city and town area | |
| 2021-01-01 | 350 | new england city and town area | |
| 2021-01-01 | 352 | new england city and town area› state (or part)› principal city | |
| 2021-01-01 | 355 | new england city and town area› necta division | |
| 2021-01-01 | 400 | urban area | |
| 2021-01-01 | 500 | state› congressional district | |
| 2021-01-01 | 795 | state› public use microdata area | |
| 2021-01-01 | 950 | state› school district (elementary) | |
| 2021-01-01 | 960 | state› school district (secondary) | |
| 2021-01-01 | 970 | state› school district (unified) | |