La Grange is a small unincorporated community and census-designated place (CDP) in rural Stanislaus County, California. Its altitude is 259 feet (76 m). As of 2020 it has a population of 166. It is located along the Tuolumne River, and is near the La Grange Dam and the New Don Pedro Dam.

The name is French and means "the barn" or "the farm". The community and a French settlement nearby were also called "French Bar". The community was founded in 1852 around the same time French miners struck gold on a bar in the Tuolumne River. By 1854, there were over 100 buildings in La Grange.

La Grange became the county seat of Stanislaus County in 1856. Aside from its French population, the community included a significant Chinatown in its early years. At its height, the community had thousands of residents, but it was a largely lawless town. It was in decline by the time that Knights Ferry became the county seat, as the gold mines were in decline. By 1880, mining had ceased. The La Grange area also included many gold dredgers that operated until the early 1950s.

On June 3, 1869, John Muir departed Legrange (French Bar) with a sheep herder and a flock of sheep and headed for the headwaters of the Merced and Tuolumne rivers. Muir writes famously of this in his book “My First Summer in the Sierra”. In chapter one, Muir describes leaving French Bar and moving with the flock into the hills near Coulterville. He writes, “This morning provisions, camp-kettles, blankets, plant-press, etc., were packed on two horses, the flock headed for the tawny foothills, and away we sauntered in a cloud of dust: Mr. Delaney, bony and tall, with sharply hacked profile like Don Quixote, leading the pack-horses, Billy, the proud shepherd, a Chinaman and a Digger Indian to assist in driving for the first few days in the brushy foothills, and myself with notebook tied to my belt. The home ranch from which we set out is on the south side of the Tuolumne River near French Bar, where the foothills of metamorphic gold-bearing slates dip below the stratified deposits of the Central Valley”. In many ways, this experience moves him so much that he writes eloquently of the Yosemite area. His books are read by Americans including President Theodore Roosevelt. Muir becomes the face of a new conservation movement to save Yosemite and create Yosemite National Park.</ref> “My First Summer In The Sierra”, by John Muir - HOUGHTON MIFFLIN COMPANY 1917

La Grange is now a registered California Historical Landmark historic district. Today, a post office, a supermarket, an elementary school (as of fall, 2015, after a brief stint as a charter school, the public school was closed), and a high school (Don Pedro High School) still operate in La Grange. Also functioning is the oldest church in Stanislaus County, St. Louis Roman Catholic Church, with a cemetery containing tombstones dating to the mid-1800s.

Historical population

Census	Pop.	Note	%±
2020	166		—
U.S. Decennial Census 1850–1870 1880-1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010 2020

La Grange first appeared as a census designated place in the 2020 U.S. Census.

La Grange CDP, California – Racial and ethnic composition
Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.

Race / Ethnicity (NH = Non-Hispanic)	Pop 2020	% 2020
White alone (NH)	90	54.22%
Black or African American alone (NH)	1	0.60%
Native American or Alaska Native alone (NH)	11	6.63%
Asian alone (NH)	3	1.81%
Pacific Islander alone (NH)	0	0.00%
Other race alone (NH)	0	0.00%
Mixed race or Multiracial (NH)	10	6.02%
Hispanic or Latino (any race)	51	30.72%
Total	166	100.00%

• California Historical Landmarks in Stanislaus County, California
• Modesto metropolitan area