According to the United States Census Bureau, the city has a total area of 30.5 square miles (79.0 km²), of which, 30.5 square miles (78.9 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.07%) is water. Several streams flow through Roseville, including Dry Creek, Linda Creek, Secret Ravine and Cirby Creek.
There were 30,783 households out of which 35.4% had children under the age of 18 living with them, 57.1% were married couples living together, 10.1% had a female householder with no husband present, and 29.0% were non-families. 23.1% of all households were made up of individuals and 9.2% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.03.
In the city the population was spread out with 26.8% under the age of 18, 7.0% from 18 to 24, 30.8% from 25 to 44, 21.0% from 45 to 64, and 14.5% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 92.1 males. For every 100 females age 18 and over, there were 88.8 males.
According to a 2006 estimate, the median income for a household in the city was $71,453, and the median income for a family was $82,769.
Males had a median income of $50,426 versus $35,494 for females. The per capita income for the city was $27,021. About 3.4% of families and 4.9% of the population were below the poverty line, including 5.3% of those under age 18 and 4.1% of those age 65 or over.
In CNN Money's "Best Places to Live" study in 2006, Roseville was ranked the skinniest city in the country, with an average body mass index of 24.5.
State Route 65 and Interstate 80 both go through Roseville.
Roseville Transit is a public transit service overseen by the City of Roseville and operated by MV Transportation. The system provides a total of 12 regular local routes, as well as the Roseville Transit Dial-A-Ride (DAR) and Roseville Transit Commuter service.
The city of Roseville is friendly to business. It has encouraged large retail centers, including one of the largest Auto Malls in the country, which contributes significantly to sales tax receipts at the city and county level. Roseville planners have used these funds to provide infrastructure to keep people moving throughout the city. This environment has produced an excellent mix of housing, small and large employers, as well as shopping opportunities.
Shopping plays a vital role in the economy of Roseville, which has the eleventh highest retail sales of all California cities as of 2008; Roseville is also the smallest of the fifteen top ranked cities in retail sales; before the economic slowdown, they were ranked number 9. Once the auto industry and economy recovers, combined with new retail, Roseville is expected to climb back into the top 10 with over $4 billion in retail sales annually. Roseville is considered a regional shopping destination, with the Westfield Galleria at Roseville being the prime example housing top stores and restaurants such as: Macy's, Nordstrom, Crate & Barrel, Abercrombie & Fitch/abercrombie, Talbots/Talbots Petites, Pottery Barn/PB Kids/PB Baby, Ann Taylor, Coach, Bebe, Guess by Marciano, Ruth's Chris Steakhouse, and The Cheesecake Factory. Westfield is currently embarking on a $260 million, expansion that will bring stores such as: Apple Store, BCBG Max Azria, Burberry, H&M, Juicy Couture, Kate Spade, Lacoste, lululemon athletica, LUSH, Oakley, Sephora, and Teavana. Traffic circulation will also be improved both on and outside the parking lot, including the Highway 65 interchange. See Westfield Galleria at Roseville for more information on the expansion.
Across the street, Peter Bollinger Investment Company is building an $80 million complex named "The Fountains" across from the mall. The first phase opened June 30th, 2008 and buildings will continually be completed in the next 2 years. It will bring Sacramento's first true "lifestyle" shopping center with stores such as Whole Foods (November), Orvis, Chico's, Coldwater Creek, DSW Shoes, Boudin Bakery (Spring 2009), Z Gallerie, White House Black Market, Jos A. Banks, Sur La Table, Peet's Coffee, Anthropologie, Soma, Lucy, West Elm, California Pizza Kitchen, McCormick & Schmicks (February 2009), Smith & Hawken (October), Sunglass Hut, Right Start, Draper's & Damon's, New Balance, The Counter Burger (November), Vera Bradley, Tres Agaves (February 2009). Phase 2 will open Spring 2009 which includes 2 more buildings in the current building area. Boudin Bakery and Ameritrade are confirmed for phase 2. Phase 3 is currently not scheduled, but includes 3 additional buildings in the current building area. Additional tenants that are listed in a Retail West brochure include: Noodles & Co. and Dave & Buster's, which has a signed lease. In a future phase across Reserve Drive. Phase 4, across Reserve Drive, will consist of a hotel, additional retail, and office buildings.
In addition, a vast growth spurt occurred around Douglas Boulevard, Rocky Ridge Road, and Eureka Road within the last ten years.
The top ten employers of the city as of 2007 are:
| Employer | Number of jobs |
|---|---|
| Hewlett-Packard | 3,600 |
| Kaiser Permanente | 3,289 |
| Sutter Roseville Medical Center | 1,922 |
| Union Pacific Railroad | 1,500 |
| City of Roseville | 1,248 |
| Roseville Elementary School District | 850 |
| RJUHSD | 803 |
| NEC Electronics | 800 |
| PRIDE Industries | 800 |
| Wal-Mart (2 stores) | 796 |
Kaiser Permanente is expected to surpass Hewlett Packard as the top employer in 2009, and will become the largest employer in Placer County. This will be due to the opening of their Women's and Children's Hospital opening in January 2009 and their new medical office building in February 2009.
Beginning in the year 1988 the city embarked on a plan for redeveloping the downtown core comprising about 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 and Blueline Gallery will open in February 2008.
NCTI (National College of Technical Instruction) provides medical training for fields such as Paramedic, EMT and 911 Dispatch.
Plans for a Sacramento State University satellite campus in Roseville which would eventually become an independent CSU campus. William Jessup University and Sierra College, a community college are located in neighboring Rocklin. Also, recently, Drexel University has announced their interest for a campus in the Roseville area.
In the late 1990s, development in the area had uncovered more unexploded ordnance (presumably thrown from the explosion), which were safely contained and destroyed.