Rocklin is a city in Placer County, California located in the metropolitan area of Sacramento. It shares borders with Roseville, Loomis, and Lincoln. As of the 2010 census, the city's population was 56,974.
Rocklin is part of the Sacramento–Arden-Arcade–Roseville Metropolitan Statistical Area located in the Sacramento Valley.
Although European-Americans were probably fishing and harvesting game in the Rocklin area in the late 18th and early 19th centuries, major European-American settlement started in the early 1850s as fortune hunters sluiced for gold in Secret Ravine, an area of oaks and dredger tailings that can be found today southeast of Interstate 80 between Roseville and Loomis.
The Rocklin post office opened in 1868. The town incorporated in 1893.
It has been submitted by Stanley Rocklin of Arizona that the town was named for a Finnish immigrant whose surname was Rocklin. This per Stanley's grandfather who told Stanley, in about 1950, when Stanley was a child, that he (the grandfather) had a Finnish ancestral distant relative, descended of the branch of the Rocklins of Russia who had earlier emigrated to Finland. This individual who had emigrated to the United States, owned a store in California during the Gold Rush (and perhaps afterwards). The Gold Rush ended in 1851.
The Rocklin area is home to eleven elementary schools, two middle schools, and two high schools - Rocklin High School and Whitney High School. It is also home to Victory High School and Rocklin Independent School, both of which make up the Rocklin Alternative Education Center.
Rocklin is the home of two colleges - Sierra College, which recently celebrated its 70th anniversary, and William Jessup University, a private Christian University which are both located conveniently in the outskirts of the Sacramento area.