Rocklin is a city in Placer County 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.
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 California Gold Rush ended in 1851.
The 2010 United States Census reported that Rocklin had a population of 56,974. The population density was 2,907.7 people per square mile (1,122.7/km²). The racial makeup of Rocklin was 47,047 (82.6%) White, 858 (1.5%) African American, 410 (0.7%) Native American, 4,105 (7.2%) Asian, 150 (0.3%) Pacific Islander, 1,538 (2.7%) from other races, and 2,866 (5.0%) from two or more races. Hispanic or Latino of any race were 6,555 persons (11.5%).
The population was spread out with 15,613 people (27.4%) under the age of 18, 5,306 people (9.3%) aged 18 to 24, 15,159 people (26.6%) aged 25 to 44, 14,668 people (25.7%) aged 45 to 64, and 6,228 people (10.9%) who were 65 years of age or older. The median age was 36.7 years. For every 100 females there were 94.0 males. For every 100 females age 18 and over, there were 90.4 males.