The City of Rocklin is located in Placer County, Northern California. Rocklin was established in 1893 and has grown into a community of over 73,000 residents. Rocklin is known for its diverse jobs and businesses, top rated schools, and outstanding quality of life. We are proud to be home to Sierra College and Jessup University. A low crime rate, outstanding parks, plenty of recreational opportunities, and a rich history make Rocklin a great place to call home for residents and businesses.