People looking for a retirement community in Jackson will find that it is a small town (4,000 people) in the historic gold mining country ofCalifornia. Jackson is nestled at the 1200 foot level in the Sierra Nevada foothills in Amador County, east of Sacramento. Teaming with the rich history of days gone by, the town has tried to blend the old and the new. It offers the serenity and friendliness of small town charm that is also close to nature. Jackson Main Street - antique shops, small boutiques and bars. Home to many historic buildings. The City of Jackson is the center of trade and industry in Amador County. Photo of downtown Jackson courtesy and per license of Wikipedia and Bobak Ha'Eri.