Guest, Sign inJoin

Post to Pittsburg

We’ll email a one-tap link to publish your post. No password, and nothing is public until you click it.
Already a member? Sign in
C+History
History · Pittsburg

Pittsburg dates to 1839

More historic than 40% of U.S. towns · #223 of 847 in California. What drives it

Most of Pittsburg was built recently: 4% of its homes predate 1940 and the median home dates from 1983. Below: 1 old photo or paper, maps from 1907 on, and the census since 1890.

1839founded
0on the National Register
4%homes built before 1940
1old photo or paper
27famous people
From Pittsburg’s archive · credits on each photo
Quick answers

How Pittsburg began

When was Pittsburg founded?

1839

Pittsburg dates its founding to 1839 (Wikidata). The census first counted it in 1890.

First census: 300 in 18902020 census: 76,416187 years

How historic is Pittsburg?

C+

More historic than 40% of U.S. towns, on its age, its old homes and the National Register.

What drives the grade ↓
Founding year: Wikidata. First post office: 1868.The full story ↓
History grade

What drives Pittsburg’s History grade

On its age, its old homes and the National Register, Pittsburg is more historic than 40% of U.S. towns, #223 of 847 in California. Its age holds the grade up; its National Register listings pull it down.

C+
HistoryA character grade: shown, never part of Pittsburg’s overall grade.
All U.S. towns we grade (21,289)Ahead of 40%
NewerOlder
California towns of 2,500+ (847)Ahead of 74%

Few California towns list much on the Register (a typical California town has 0.0 per 10,000 residents, the U.S. 2.4), so Pittsburg’s 0.0 sits below most of its state (31% of California towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.

NoteThe founding year comes from Wikidata alone; no second source gives 1839.
How sure. Graded on any two of the three inputs instead, the letter would range from C− to B−. The pre-1940 share (±1.4 points) is firm at this size.

Founding year: Wikidata (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 Pittsburg’s past

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

★ What stands out · Help out

Start Pittsburg’s collection

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

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
1 of 10 decades. The empty ones are waiting for someone’s album.
Places that used to be

Lost post offices, old corners and places now gone

Pittsburg’s post office has been open since 1911. Three other post offices opened and closed inside today’s town.

Black Diamond
1868–1911
Cornwall Station
1881–1888
Cornwall
1890–1911
Pittsburg
1911–today
18601940today
Hamlets and corners on the map
CornwallDiamondHooperLos Medanos
Gone or out of use
First Methodist Churchchurch

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

On the map

Pittsburg on the map, 1907 to 1980

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

Pittsburg on the 1907 USGS mapPittsburg on the 1918 USGS mapPittsburg on the 1953 USGS mapPittsburg on the 1968 USGS mapPittsburg on the 1973 USGS mapPittsburg on the 1980 USGS map1907Antioch 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 Pittsburg.

The story

How Pittsburg came to be

From Wikipedia’s history of Pittsburg.

Read it all →

Originally settled in 1839 as Rancho Los Méganos, the area of almost 10,000 acres was issued to Californios Jose Antonio Mesa and his brother Jose Miguel under a Mexican Land Grant by then Governor Juan Bautista Alvarado, one of the final land grants issued prior to the formation of California as a state.

Text from Wikipedia, licensed CC BY-SA 4.0.

From the old history books

What they wrote about Pittsburg, 1882–1926

Passages that mention Pittsburg, cut from the printed page as they were published.

Six months prior to settling in Pittsburg, Mr. Thomason was agent at Concord, Cal., for the Sacramento Short Line; then he came to Pittsburg as station agent for the same company and served for the following fifteen months. He then entered the employ of the Columbia Steel Works at Pittsburg, first …
History of Contra Costa County, California1926 · page 875Read the page →
Read the text

Six months prior to settling in Pittsburg, Mr. Thomason was agent at Concord, Cal., for the Sacramento Short Line; then he came to Pittsburg as station agent for the same company and served for the following fifteen months. He then entered the employ of the Columbia Steel Works at Pittsburg, first as a shipping clerk, and by subsequent promotions rose to be superintendent of the finishing department. He was with this company during the World War and his term of service covered eight years. On November 1, 1924, Mr. Thomason entered the general

Text read by machine from the scan; it may contain errors.
The city of Pittsburg has at present (1925) an estimated population of 7500. The site of what is now Pittsburg was brought into public notice when the United States Army and Navy engineers investigated it as a possible military and naval base, but little ever came of their investigations, though a …
History of Contra Costa County, California1926Read the page →
Read the text

The city of Pittsburg has at present (1925) an estimated population of 7500. The site of what is now Pittsburg was brought into public notice when the United States Army and Navy engineers investigated it as a possible military and naval base, but little ever came of their investigations, though a townsite was surveyed and given the name "New York of the Pacific."

Text read by machine from the scan; it may contain errors.
On April i, 191 1, the Oakland, Antioch & Eastern Railway was incorporated to build a line from Bay Point to Sacramento, with a branch line about two miles long from West Pittsburg to Pittsburg. Building commenced in July, 191 2, and the line from Bay Point to Pittsburg was completed and put into o…
The history of Contra Costa County, California1917 · page 294Read the page →
Read the text

On April i, 191 1, the Oakland, Antioch & Eastern Railway was incorporated to build a line from Bay Point to Sacramento, with a branch line about two miles long from West Pittsburg to Pittsburg. Building commenced in July, 191 2, and the line from Bay Point to Pittsburg was completed and put into operation in August, 191 3. In the meantime, the Oakland, Antioch & Eastern Railway leased the Oakland & Antioch Railway and also the San Ramon Valley Railroad, running from Saranap on the main line to Danville. Finally, in September, 1913, the Oakland,

Text read by machine from the scan; it may contain errors.
These, with the Union and Independent, comprise the mines forming the basin in which the town of Somersville is situated, and from which there is a railroad to Pittsburg Landing, which takes its name from the Pittsburg mines. The Pittsburg coal mine was opened in December, 1860, and was located by …
History of Contra Costa County, California, including its geography, geology, topography, climatography and description1882Read the page →
Read the text

These, with the Union and Independent, comprise the mines forming the basin in which the town of Somersville is situated, and from which there is a railroad to Pittsburg Landing, which takes its name from the Pittsburg mines. The Pittsburg coal mine was opened in December, 1860, and was located by George H. P. Henderson, who entered into a contract with Ezra Clark to open the mine, in the course of which the noted Clark vein was discovered. The Manhattan mine is in the same neighborhood, while a short dis-

Text read by machine from the scan; it may contain errors.

Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.

Timeline

Pittsburg, 1839 to 1976

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

  1. 19th century
  2. 1839
    FoundingPittsburg is established
  3. 1868Post officeThe Black Diamond post office opens
  4. 1881Post officeThe Cornwall Station post office opens
  5. 1888Post officeThe Cornwall Station post office closes
  6. 1890Post officeThe Cornwall post office opens
  7. 20th century
  8. 1907On the mapFirst mapped by the U.S. Geological Survey
  9. 1911Post officeThe Black Diamond post office closes
  10. 1911Post officeThe Cornwall post office closes
  11. 1921In the archivePittsburg, Cal., school children in first parade for Red Cross milk fund. Slogan "give us…
  12. 1935Born herePete Escovedo is born here
  13. 1949Born hereKaren Vogtmann is born here
  14. 1975Born hereDante Basco is born here
  15. 1976Born hereAaron Miles is born here
By decade

Pittsburg, decade by decade

One decade in the archive so far: the 1920s. Scroll each row; tap a photo for its story.

Every building

Pittsburg, building by building, 1911–1917

Fire insurance maps drew every building, what it was made of and what it was used for, so insurers could price the risk of fire. Pick a year, then a sheet.

Pittsburg fire insurance map, 1911, sheet 11911Sheet 1 of 10
Edition
BrickWoodStone

Sanborn Map Company, via the Library of Congress. Editions published in 1930 or earlier, which are in the public domain.

Then & now

Stand where they stood

No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.

Pittsburg, Cal., school children in first parade for Red Cross milk fund. Slogan "give us old clothes for milk" brought…
Retake this viewPittsburg, Cal., school children in first parade for Red Cross milk fund. Slogan "give us old clothes for milk" brought…, 1921

Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on Pittsburg’s page.

Retake this view · +15
People over time

Pittsburg, census by census

020,00040,00060,00080,000190019201940196019802000202076,416

Grew from 300 people in 1890 to 76,416 in 2020, more than tenfold.

14 censuses, 1890–2020.

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

Famous people

27 famous people were born in Pittsburg

Writers, athletes, leaders and more, ranked by how widely they’re known.

See all →
Stories next door

History across the town line

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

Questions about Pittsburg’s history

What year was Pittsburg founded?

In 1839, according to Wikidata. Pittsburg’s post office opened in 1868, and the census of 1890 counted 300 people here.

How does Pittsburg rank for history?

Pittsburg is more historic than 40% of U.S. towns, #223 of 847 in California. 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 Pittsburg?

4% of Pittsburg’s homes were built before 1940 (Census estimate, ±1.4 points), against a typical 3.4% for a California town; the median home was built in 1983.

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 (20), the Library of Congress (1), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock), the USGS Geographic Names Information System, Sanborn fire insurance maps (Library of Congress) and old county and town histories (Internet Archive). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.