1,206-CITY ATLASSOURCE-BACKED CITY REFERENCE
United States
Compare this sourced profile of Tucson, United States before planning. Stable fields identify the place; confirm current transport, access and opening details with official sources.
01What the data says — and does not say
This page separates the checked GeoNames row for Tucson—542,629, America/Phoenix, and source coordinates—from live travel claims. Those fields identify and compare the record; they do not prove current transport, accessibility, census totals, or a City Atlas Club visit.
Wikidata's localized description: city in and county seat of Pima County, Arizona, United States.
02This city's dataset fingerprint
The source row behind Tucson is GeoNames ID 5318313. Its recorded administrative path is Pima County → Arizona → United States, and GeoNames classifies the place as a second-order administrative seat. Tucson occurs once as a primary city label in this atlas sample; the numeric ID remains the durable source key if names change. The city row itself was updated 2025-06-25; that date belongs to the source record, not to every transport or visitor detail in the real destination.
Within the fixed 1,206-record atlas, Tucson ranks 1,032 by recorded population. Inside the 43 selected United States entries it ranks 37; inside the 198 entries in its broad region it ranks 167. Its 542,629 population value is 0.69 times the 780,995 median for the country cohort and 0.66 times the 816,326 regional median. Tucson sits in the lower half of this atlas's selected United States entries. Tucson's recorded value is materially below the country-cohort median used here. These comparisons describe this selected dataset only; they are not current census rankings or official urban-area boundaries.
Tucson's three nearest other atlas coordinates are Phoenix at 173.488 km with 1,650,070 recorded people; Hermosillo at 348.395 km with 812,229 recorded people; El Paso at 421.81 km with 678,815 recorded people. The closest-to-farthest distance spread is 248.322 km. Compared with Phoenix, Tucson's recorded population is 0.33 times as large. Against Tucson, Phoenix follows Maricopa County → Arizona → United States in the source. Its point has higher latitude and lower longitude; it belongs to the same selected United States cohort, uses the shared America/Phoenix identifier, and carries first-order administrative seat rather than second-order administrative seat. Its recorded population is above Tucson's. Against Tucson, Hermosillo follows Hermosillo → Sonora → Mexico in the source. Its point has lower latitude and lower longitude; it belongs to the selected Mexico cohort rather than United States, uses America/Hermosillo instead of America/Phoenix, and carries first-order administrative seat rather than second-order administrative seat. Its recorded population is above Tucson's. Against Tucson, El Paso follows El Paso County → Texas → United States in the source. Its point has lower latitude and higher longitude; it belongs to the same selected United States cohort, uses America/Denver instead of America/Phoenix, and carries the same second-order administrative seat class. Its recorded population is above Tucson's. Its nearest-neighbor distance ranks 943 of 1,206 from shortest to longest in the same snapshot. Tucson's nearest-coordinate gap belongs to the wider half of atlas distances. This pattern can reveal whether other catalog references are geographically close, but it cannot establish whether a border crossing is possible or practical, or whether rail, road, fare, or journey-time connections exist. Read as one record signature, GeoNames 5318313, the coordinate pair 32.2217 / 110.9265, country rank 37 of 43, and neighbor GeoNames 5308655 at 173.488 km bind Tucson to a reproducible comparison. That combined key distinguishes the row; it is not a recommendation or evidence of a physical connection.
Tucson's reference point is 32.2217° north and 110.9265° west. The IANA identifier America/Phoenix is shared by 2 city rows in this catalog, while the GeoNames class PPLA2 is shared by 341 rows. Tucson's row carries both second- and first-order administrative labels. Tucson's point falls in the middle-latitude coordinate band used by this atlas's row checks. Tucson's time-zone field defines the narrower catalog cohort; its place class is shared more broadly. GeoNames records Tucson at 759 metres above sea level, a single reference value rather than a description of slopes across the city. Together these fields form a reproducible identity check for this page, not a claim about walkability, climate or accessibility.
03Nearby atlas references
Tucson's closest other entries in this atlas are Phoenix (173.488 km), Hermosillo (348.395 km), El Paso (421.81 km).
04Verify before you book
Before visiting Tucson, confirm changing decisions with current first-party sources:
Read how City Atlas Club verifies changing travel facts →05Sources and freshness
GeoNames updated the row 2025-06-25; the atlas checked the dataset 2026-08-04. Available Wikidata fields were verified in the same run.
GeoNames data: CC BY 4.0. Wikidata labels and descriptions: CC0 1.0.