Most of Loma Rica was built recently: 3% of its homes predate 1940 and the median home dates from 1984. Below: 1 old photo or paper, maps from 1912 on, and the census since 1990.
On its age, its old homes and the National Register, Loma Rica is more historic than 15% of U.S. towns. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
D
HistoryA character grade: shown, never part of Loma Rica’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 Loma Rica’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 two of the three inputs, so a change in either one moves the letter more than it would with three. The pre-1940 share is a Census survey estimate (±3.1 points).
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 Loma Rica’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Every edition of the U.S. Geological Survey’s map of Loma Rica. Tap a year, or press play to watch the town change.
1912Prairie Creek sheet · 1:31,680
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Loma Rica.
The story so far
Loma Rica, in brief
Wikipedia doesn’t have a history of Loma Rica yet. The photos, dates and memories neighbors add here are how it gets written.
Loma Rica (Spanish for "Rich Hill") is a census-designated place (CDP) in Yuba County, California, United States. The population was 2,409 at the 2020 census, up from 2,368 at the 2010 census. Loma Rica is located 15 miles (24 km) northeast of Marysville.
Its population held steady between the last two censuses: 2,368 in 2010, 2,409 in 2020.
Intro from Wikipedia. Population: U.S. Census Bureau.
Loma Rica 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 Loma Rica?
3% of Loma Rica’s homes were built before 1940 (Census estimate, ±3.1 points), against a typical 3.4% for a California town; the median home was built in 1984.
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 Library of Congress (1), U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia) 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.
Date?
