US State Identifiers — state

The 50 states and District of Columbia — all naming and coding systems used to refer to each state. The backing data for state_convert().

state_ids

Format

A tibble with 51 rows and 6 variables:

name: Full legal name
abb: 2-letter USPS abbreviation
fips: Federal Information Processing Standard Publication 5-2 code
icp: IPUMS Integrated Census Project (STATEICP) code, zero-padded 2-digit string
ap: AP style abbreviation; the 8 states with no AP abbreviation (Alaska, Hawaii, Idaho, Iowa, Maine, Ohio, Texas, Utah) use the full state name per AP style
iso: ISO 3166-2 code (e.g. "US-AL")

Source

Names, abbreviations, FIPS: https://www2.census.gov/geo/docs/reference/state.txt
ICP codes: https://usa.ipums.org/usa-action/variables/STATEICP
AP abbreviations: AP Stylebook
ISO 3166-2: ISO Online Browsing Platform

Details

Naming convention: underscore objects (state_ids, state_facts, state_geo) are modern purpose-built tibbles. Convenience vectors (state_abbs, state_names, etc.) mirror the base R datasets::state.* vectors but cover all 51 rows (50 states + DC).