Flagstaff in Coconino County, Arizona — The American Mountains (Southwest)

Flagstaff's Third Post Office

Est. 1917

Photographed by Cosmos Mariner, June 1, 2015

1. Flagstaff's Third Post Office Marker

Inscription. Original proprietors
T.A. Riordan
David Babbit

Architect
J. Kennedy

Construction by
Edivaros & Wiley
Los Angeles

National Registery
of Historic Places
Number FHR 107

Topics. This historical marker is listed in these topic lists: Architecture • Communications. A significant historical year for this entry is 1917.

Location. 35° 11.908′ N, 111° 38.842′ W. Marker is in Flagstaff, Arizona, in Coconino County. It is on North San Francisco Street north of East Aspen Avenue, on the right when traveling north. Marker is mounted at eye-level just to the left of the building entrance. Touch for map. Marker is at or near this postal address: 106 North San Francisco Street, Flagstaff AZ 86001, United States of America. Touch for directions.

Regionally, this marker is in Flagstaff & High Country

and in Hopi.

It is also in the American Southwest,

in the Mountain West,

in Colorado Plateau,

and at the Four Corners.

Globally, it is in North America,

the Western Hemisphere,

the Western World,

and the Anglosphere.

Historically, it finds itself in what was once New Spain

and also Mexico’s Alta California.

Other nearby markers. At least 8 other markers are within walking distance of this marker: Federal Building / Flagstaff's Fifth Post Office (a few steps from this marker); Babbitt Brothers Building (within shouting distance of this marker); Verkamp Building (within shouting distance of this marker); Biology (within shouting distance of this marker); Geology (within shouting distance of this marker); Rickel & Brooks Bldg. (within shouting distance of this marker); International Day of Peace

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(about 300 feet away, measured in a direct line); Flagstaff's Founding (about 300 feet away). Touch for a list and map of all markers in Flagstaff.

Regarding Flagstaff's Third Post Office. Contributing property, Railroad Addition Historic District, National Register of Historic Places #83002989.

Also see . . . Railroad Addition Historic District. The Flagstaff Railroad Addition Historic District is significant because of its association with the Atchison, Topeka and Santa Fe Railway as well as U.S. Route 66. (Submitted on October 10, 2020, by Cosmos Mariner of Cape Canaveral, Florida.)

Flagstaff's Third Post Office image. Click for full size.

Photographed by Cosmos Mariner, June 1, 2015

2. Flagstaff's Third Post Office

(marker visible just left of entrance)

Photographed by Adam Margolis, May 24, 2024

3. Flagstaff's Third Post Office Marker

Credits. This page was last revised on June 28, 2025. It was originally submitted on October 9, 2020, by Cosmos Mariner of Cape Canaveral, Florida. This page has been viewed 538 times since then and 40 times this year. Photos: 1, 2. submitted on October 10, 2020, by Cosmos Mariner of Cape Canaveral, Florida. 3. submitted on December 16, 2024, by Adam Margolis of Mission Viejo, California.