1 of Sierra Vista Southeast’s places is on the National Register
More historic than 26% of U.S. towns · #51 of 140 in Arizona. What drives it
Its Register listing is the Hereford Bridge. Most of Sierra Vista Southeast was built recently: 0.7% of its homes predate 1940 and the median home dates from 1994. Below: maps from 1932 on and the census since 1990.
What drives Sierra Vista Southeast’s History grade
On its age, its old homes and the National Register, Sierra Vista Southeast is more historic than 26% of U.S. towns, #51 of 140 in Arizona. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
C
HistoryA character grade: shown, never part of Sierra Vista Southeast’s overall grade.
Few Arizona towns list much on the Register (a typical Arizona town has 0.1 per 10,000 residents, the U.S. 2.4), so Sierra Vista Southeast’s 0.7 sits near the middle of its state (63% of Arizona towns have fewer) while its 1 listings outnumber those of 51% of U.S. towns.
How sure. Graded on two of the three inputs, so a change in either one moves the letter more than it would with three. The pre-1940 share (±0.8 points) is firm at this size.
Founding year: our sources. Homes: Census ACS 2020–24. National Register: National Park Service, May 2026 list; each listing counted once (boundary changes and added documentation belong to their listing), and a historic district counts its contributing buildings. How TownRatings grades history →
What stands out about Sierra Vista Southeast’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Lost post offices, old corners and places now gone
Three other post offices opened and closed inside today’s town.
San Pedro
1872–1880
Reef
1901–1904
Hereford
1904–today
Hamburg
1906–1929
18701950today
Hamlets and corners on the map
Air Haven Mobile Home EstatesBlack Bear SpringBledsoeNicksvilleRamseySierra Vista Estates
Gone or out of use
Baumkirchner MinemineGolden Fleece MinemineHamburg MinemineHereford AirportairportHereford Army Air FieldmilitaryLutz TunnelmineMorgan MineminePomono MinemineReef MinemineSan Pedrolocale
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
The story so far
Sierra Vista Southeast, in brief
Wikipedia doesn’t have a history of Sierra Vista Southeast yet. The photos, dates and memories neighbors add here are how it gets written.
Sierra Vista Southeast, often referred to as Hereford or Nicksville, is a census-designated place (CDP) in Cochise County, Arizona, United States. The population was 14,428 at the 2020 census. It includes the neighborhoods Ramsey Canyon, and Sierra Vista Estates within its boundaries.
Between the 2010 and 2020 censuses its population fell from 14,797 to 14,428 (-2%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Sierra Vista Southeast, 1872 to 1932
Woven from the archive, old maps, post office records, the National Register and the people born here.
Every edition of the U.S. Geological Survey’s map of Sierra Vista Southeast. Tap a year, or press play to watch the town change.
1932Stark sheet · 1:62,500
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Sierra Vista Southeast.
On the National Register
1 historic place in Sierra Vista Southeast
The country’s official list of buildings and places worth saving.
Sierra Vista Southeast is more historic than 26% of U.S. towns, #51 of 140 in Arizona. The History grade combines the town’s founding era, the share of homes built before 1940 and its National Register listings. It’s a character grade, so it isn’t part of the overall grade. How it works.
What is on the National Register in Sierra Vista Southeast?
One place: the Hereford Bridge (listed 1988).
How old are the homes in Sierra Vista Southeast?
0.7% of Sierra Vista Southeast’s homes were built before 1940 (Census estimate), against a typical 0.4% for an Arizona town; the median home was built in 1994.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021).
From the National Register of Historic Places (1), U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.
