U.S. Route 191 in Arizona
section of U.S. Numbered Highway in Arizona, United States
U.S. Route 191 (US 191) is a north–south U.S. Highway in eastern Arizona. The highway runs for 516.50 miles (831.23 km), making it Arizona's longest numbered highway. The highway begins at State Route 80 near Douglas and crosses over the Utah state line near Mexican Water in the Navajo Nation. Between Douglas and Utah, US 191 shares multiple concurrencies with I-10, US 70, US 180, US 60, SR 61, I-40, SR 264, and US 160.
Until 1981, the route taken by US 191 between I-40 in Chambers and the Utah state line was designated as SR 63. The route from SR 80 in Douglas to I-40 in Sanders was originally designated as part of US 666. US 666 was often associated with the biblical devil, due to the number 666 occasionally being considered the "number of the beast." The highway number caused discomfort with the general public and led to the constant sign theft of US 666 markers along the highway, prompting the redesignation of US 666 as a section of US 191 in 1992.
Route description
With a total length of 516.50 miles (831.23 kilometres), the section of U.S. Route 191 (US 191) through Arizona has the longest distance of any numbered highway within the state. US 191 almost traverses the entire length of Arizona, but just short of the Mexican border at SR 80 near Douglas. However, the route is connected to the border via SR 80 and US 191 Business (which has no direct connection to US 191 proper).
“U.S. Route 191 in Arizona” enters the record as section of U.S. Numbered Highway in Arizona, United States. Crown Archives preserves that source wording while asking what Route, Arizona and section can confirm, complicate or overturn.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 18, 2026. The linked authority identifier is Q61232473. None of the 1 selected statements returned an explicit reference. The first chronological checks are 1981 and 1992.
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This entry incorporates text from “U.S. Route 191 in Arizona” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.