Most of Junction City was built recently: 0.8% of its homes predate 1940 and the median home dates from 1985. Below: maps from 1951 on and the census since 1870.
The Junction City post office opened in 1861, the earliest record of the town by name. Another post office, Messerville (1860), opened inside today’s town and later closed.
First census: 440 in 18702020 census: 658165 years
How historic is Junction City?
C−
More historic than 15% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Junction City post office (Blevins & Helbock, CC0).The full story ↓
History grade
What drives Junction City’s History grade
On its age, its old homes and the National Register, Junction City is more historic than 15% of U.S. towns. Its age holds the grade up; its share of homes from before 1940 pulls it down.
C−
HistoryA character grade: shown, never part of Junction City’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 Junction City’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.
How sure. Graded on any two of the three inputs instead, the letter would range from D to C−. The pre-1940 share (±1.0 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 Junction City’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Junction City was established when a few cabins were built in the 1850s at the mouth of Canyon Creek, it was originally called "Milltown" due to the number of mills, but in 1861 it was officially named Junction City since it served as a junction for several transportation routes at Canyon Creek and Trinity River.
Junction City had the largest and most famous diversion dam. The Arkansas Dam, was built in 1851, four miles upstream of Junction City. After the dam washed out in the winter of 1851 and again in 1852, it was rebuilt so substantially as to withstand not only the winter storms but also contain an upstream dam break flood that occurred when the 14-foot-high diversion dam at Union bar gave way.
Every edition of the U.S. Geological Survey’s map of Junction City. Tap a year, or press play to watch the town change.
1951Hayfork 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 Junction City.
People over time
Junction City, census by census
Between 440 and 680 people in every census since 1870.
4 censuses, 1870–2020.
U.S. Census Bureau decennial counts, from the census table on Junction City’s Wikipedia page.
Famous people
Famous people close to Junction City
Nobody well known was born in Junction City itself, so here are the best known from just nearby.
Lost post offices, places now gone and burying grounds
Junction City’s post office has been open since 1861. Another post office, Messerville, opened and closed inside today’s town.
Messerville
1860–1861
Junction City
1861–today
18601940today
Gone or out of use
La Grange PitmineMcGillivrays RanchlocaleRed Hill Minemine
1cemetery inside Junction City
Helena
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Questions about Junction City’s history
What year was Junction City founded?
The Junction City post office opened in 1861, the earliest record of the town by name (U.S. post office records).
How does Junction City rank for history?
Junction City is more historic than 15% of U.S. towns. 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 Junction City?
0.8% of Junction City’s homes were built before 1940 (Census estimate, ±1.0 points), against a typical 3.4% for a California town; the median home was built in 1985.
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 Wikipedia, 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.
