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.
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.
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.
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.
Passages that mention Pittsburg, cut from the printed page as they were published.
History of Contra Costa County, California1926 · page 875Read the page →
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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.
History of Contra Costa County, California1926Read the page →
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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.
The history of Contra Costa County, California1917 · page 294Read the page →
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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.
History of Contra Costa County, California, including its geography, geology, topography, climatography and description1882Read the page →
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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.
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
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.
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.
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.