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D−History
History · Green Valley

Green Valley’s post office opened in 1964

Among the newest of U.S. towns · #132 of 140 in Arizona. What drives it

Most of Green Valley was built recently: 0.1% of its homes predate 1940 and the median home dates from 1985. Below: maps from 1958 on and the census since 1980.

1964first post office
0on the National Register
0.1%homes built before 1940
Add an old photoShare a memory
Quick answers

How Green Valley began

When was Green Valley founded?

1964

The Green Valley post office opened in 1964, the earliest record of the town by name. Another post office, Continental (1917), opened inside today’s town and later closed.

First census: 5,717 in 19802020 census: 22,61662 years

How historic is Green Valley?

D−

Among the newest of U.S. towns, on its age, its old homes and the National Register.

What drives the grade ↓
Founding year: the first Green Valley post office (Blevins & Helbock, CC0).
History grade

What drives Green Valley’s History grade

On its age, its old homes and the National Register, Green Valley is among the newest of U.S. towns, #132 of 140 in Arizona. Its National Register listings hold the grade up; its age pulls it down.

D−
HistoryA character grade: shown, never part of Green Valley’s overall grade.
Founding era1964, from the first post office: founded 1945 or later, an older era than 2% of U.S. townsD−Homes built before 19400.1% of homes (±0.1) · typical AZ town 0.4% · U.S. 8.4%DNational RegisterNo listings counted · typical AZ town 0.1 per 10,000 · U.S. 2.4C
All U.S. towns we grade (21,289)Among the newest
NewerOlder
Arizona towns of 2,500+ (140)Ahead of 6%

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 Green Valley’s 0.0 sits below most of its state (29% of Arizona towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.

How sure. Graded on any two of the three inputs instead, the letter would range from D− to D. The pre-1940 share (±0.1 points) is firm at this size. The founding year is the first post office, not a stated founding date.

Founding year: the first post office (other dates in Quick answers). 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 Green Valley’s past

Read from the archive, the National Register and the record. The page puts what stands out first.

A history waiting to be writtenNo old photos of Green Valley are in the public archives yet. The rest are in attics and albums.
★ What stands out · Help out

Start Green Valley’s collection

The first neighbors to add old photos shape how Green Valley’s history is told.

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
Share a family photoSign in to add one+10
The story so far

Green Valley, in brief

Wikipedia doesn’t have a history of Green Valley yet. The photos, dates and memories neighbors add here are how it gets written.

Green Valley is an unincorporated community and census-designated place (CDP) in Pima County, Arizona, United States. The population was 22,616 at the 2020 census.

Its first post office opened in 1964. Between the 2010 and 2020 censuses its population grew from 21,391 to 22,616 (+6%).

Intro from Wikipedia. Population: U.S. Census Bureau.

Timeline

Green Valley, 1917 to 1964

Woven from the archive, old maps, post office records, the National Register and the people born here.

  1. 20th century
  2. 1917Post officeThe Continental post office opens
  3. 1929Post officeThe Continental post office closes
  4. 1958On the mapFirst mapped by the U.S. Geological Survey
  5. 1964Post officeThe Green Valley post office opens
By decade

Green Valley, decade by decade

Today6 recent
Faith Hope & Love with Mother 22008Faith Hope & Love with Mother 2Bubo virginianus -adult and chicks -Arizona-82008Bubo virginianus -adult and chicks -Arizona-8Green Valley Sunset2006Green Valley SunsetFreeport-McmoranCopper&GoldMining-GreenValleyArizona2006Freeport-McmoranCopper&GoldMining-GreenValleyArizonaCaution golf carts2006Caution golf cartsAZMap-doton-Green Valley2004AZMap-doton-Green Valley
On the map

Green Valley on the map, 1958 to 1981

Every edition of the U.S. Geological Survey’s map of Green Valley. Tap a year, or press play to watch the town change.

Green Valley on the 1958 USGS mapGreen Valley on the 1981 USGS map1958Sahuarita 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 Green Valley.

People over time

Green Valley, census by census

05,00010,00015,00020,00025,00019802000202022,616

Grew from 5,717 people in 1980 to 22,616 in 2020, 3 times over.

5 censuses, 1980–2020.

U.S. Census Bureau decennial counts, from the census table on Green Valley’s Wikipedia page.

Places that used to be

Lost post offices, old corners and burying grounds

Green Valley’s post office has been open since 1964. Another post office, Continental, opened and closed inside today’s town.

Continental
1917–1929
Green Valley
1964–today
19101970today
Hamlets and corners on the map
ContinentalGreen Valley Pueblo Estates
1cemetery inside Green Valley
Continental

US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).

Stories next door

History across the town line

Each neighbor’s History grade, on the same three inputs.

Sahuarita1 historic placeC−

Questions about Green Valley’s history

What year was Green Valley founded?

The Green Valley post office opened in 1964, the earliest record of the town by name (U.S. post office records).

How does Green Valley rank for history?

Green Valley is among the newest of U.S. towns, #132 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.

How old are the homes in Green Valley?

0.1% of Green Valley’s homes were built before 1940 (Census estimate), against a typical 0.4% for an Arizona town; the median home was built in 1985.

Memory lane

What the archives can’t tell you, neighbors can.

Town Square →
Start a conversation
Sources

Where this page comes from

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 Wikimedia Commons (6), 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.