Weimar (formerly, New England Mills and Weimer) is an unincorporated community in Placer County, California, located in the Sacramento area. Weimar is located 4.5 miles (7.2 km) south-southwest of Colfax.
By car, Weimar is about one hour from Reno, Nevada and about one hour northeast of Sacramento, California on east I-80. It is directly adjacent to Interstate 80. Amtrak stops at Colfax, California which is about 3 miles east on I-80 past Weimar. Weimar, California was originally named New England Mills. The elevation is about 2300–2600 feet.
Weimar has a campground in it, and also has access to the North Fork of the American River. The former Weimar Sanitorium, a Tuberculosis treatment hospital, is now Weimar Institute, home to the NEWSTART Lifestyle Program. The Institute also includes Weimar College, and Weimar Academy, a boarding school for high school students, both associated with the Seventh-day Adventist Church. It is also home to the Weimar Hills Public School, which offers grades 4th through 8th.
The Weimar post office opened in 1866. An explanation of the town's name comes from the Geisendorfer family; descendants of George Geisendorfer, founder of the town. George Geisendorfer was born in the area of Weimar, Germany. Many of the original inhabitants of Weimar (New England Mills) were also of German descent. Members of the town, and the Geisendorfer family, have testified that George Geisendorfer himself decided to rename the town “Weimar” when the post office rejected the original name of New England Mills.
Its ZIP code is 95736 and its area code 530.