As of the censusGR2 of 2000, there were 1,223,400 people, 450,691 households, and 271,315 families residing in the city. The population density was 3,771.9 people per square mile (1,456.4/kmē).
There were 469,689 housing units at an average density of 1,448.1 per square mile (559.1/kmē). The racial makeup of the city is as follows:There were 450,691 households out of which 30.2% had children under the age of 18 living with them, 44.6% were married couples living together, 11.4% had a female householder with no husband present, and 39.8% were non-families. 28.0% of all households were made up of individuals and 7.4% had someone living alone who was 65 years of age or older. The average household size was 2.61 and the average family size was 3.30.
In the city the population was spread out with 24.0% under the age of 18, 12.4% from 18 to 24, 34.0% from 25 to 44, 19.1% from 45 to 64, and 10.5% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 101.7 males. For every 100 females age 18 and over, there were 100.4 males.
The median income for a household in the city was $45,733, and the median income for a family was $53,060. Males had a median income of $36,984 versus $31,076 for females. The per capita income for the city was $23,609. About 10.6% of families and 14.6% of the population were below the poverty line, including 20.0% of those under age 18 and 7.6% of those age 65 or over.
According to estimates by the San Diego Association of Governments, the median household income of San Diego in 2005 was $62,085 (not adjusted for inflation). When adjusted for inflation 1999 dollars; comparable to Census data above), the median household income was $50,415. According to the U.S. Census 2004 American Community Survey, San Diego city had the fifth largest median household income of places with a population of 250,000 or more.
| San Diego MLS Real Estate Listings | San Diego Culture | |
| San Diego Education | San Diego Economy | |
| San Diego Demographics | San Diego Transportation | |
| San Diego Climate |