As of 2005, there were 103,845 people, 42,538 households, and 21,855 families residing in the city. The population density was 2,622.5 people per square mile (1,012.4/km²). There were 31,925 housing units at an average density of 1,047.6/sq mi (404.4/km²). The racial makeup of the city was 86.03% White, 1.31% African American, 0.70% Native American, 4.31% Asian, 0.20% Pacific Islander, 3.93% from other races, and 3.53% from two or more races. Hispanic or Latino of any race were 11.54% of the population.
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 2007 estimate, the median income for a household in the city was $68,273, and the median income for a family was $84,863 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.
Two highways run through the city. State Route 65 the southern terminus of which connects to Interstate 80.
Amtrak, the national passenger rail system, provides service to Roseville at the Roseville Amtrak Station and is part of the Capitol Corridor.
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. There are several stops where connections may be made with the Sacramento Regional Transit line and Placer County Transit.
Placer County Transit connects Roseville with the Watt/I-80 light rail station, as well as the cities of Auburn, Lincoln, Rocklin, and other cities along the Interstate 80 corridor. The Placer Commuter Express service to Sacramento also serves the Taylor Rd. park and ride lot.