Roseville (formerly, Roseville Junction, Junction, and Griders) is a city in Placer County, California, United States, located in the metropolitan area of Sacramento. As of the 2010 U.S. Census, the population was 118,788. Roseville's population is expected to reach 133,680 by 2015.  Interstate 80 runs through Roseville and State Route 65 bisects the northern part of the city.

Roseville is the largest city in Placer County.

The settlement was originally a stage coach station called Griders.  When the railroad arrived, the name was changed to Junction and then to Roseville.

The Roseville post office opened in 1864.  Roseville incorporated as a city in 1909.

Beginning in the year 1988 the city embarked on a plan for redeveloping the downtown core comprising about 207 acres (0.8 km²) of land.  Over the past years and into the future, the city is spending tens of millions of dollars on revitalizing its historic areas. The areas have been in decline for a long time. The city has already completed its Vernon Streetscape Project and is now working on its Historic District and Riverside Corridor Streetscape Projects. Also, the city has teamed up with Kobra Properties to develop a parking garage/office building/art gallery. It will house the new Roseville Arts Blueline Gallery and will also provide the needed parking along with the new office workers. Grand opening of parking garage was in November 2007 and Blueline Gallery in February 2008.

Roseville lies within the Sierra Community College District. The main campus is located in neighboring Rocklin and there is an extension campus in Roseville titled Roseville Gateway. It offers certificates and Associate of Arts degrees.

Roseville is part of the Roseville City School District, Eureka Union School District, Dry Creek Join Elementary School District, and Roseville Joint Union High School District. St. Albans Country Day School is an elementary and secondary school in the town.

Heald College (now closed) is a for-profit college aimed at students seeking business oriented careers, and generally offers two year programs. University of Phoenix is located in Roseville and offers a wide variety of degrees with the option of taking classes online or on campus. Chapman University, a private non-profit college, has an extension campus in town that offers classes at night and is aimed at working professionals.

The Institute of Technology is a technical schoo l in Roseville, and offers career focused education in a number of fields, including culinary arts, business and health care. IOT also has a culinary arts school, which offers three complete and unique programs.

William Jessup University, the only Christian university in the Sacramento metropolitan area, is located in neighboring Rocklin. Recently, Drexel University has announced their interest for a campus in the Roseville area.

There are plans for a Sacramento State University satellite campus in Roseville which could eventually become an independent CSU campus.