The census of 2000 found there were 143,072 people, 51,199 households, and 34,354 families in the city.
The population density was 3,098.0 inhabitants per square mile (1,196.2/km²), as of the census.
There were 53,711 housing units at an average density of 1,163.0 per square mile (449.1/km²).
The racial makeup of the city was 61.1% White, 7.4% of the population were Hispanic or Latino of any race, 1.5% Black or African American, 0.2% Native American, 29.8% Asian, 1.1% Pacific Islander, 2.5% from other races, and 4.8% from two or more races.

There were 51,199 households, out of which 36.0% had children under the age of 18 living with them, 53.8% were married couples living together, 9.8% had a female householder with no husband present, and 32.9% were non-families.
22.8% of all households were made up of individuals, and 5.0% had someone living alone who was 65 years of age or older.
The average household size was 2.70 persons and the average family size was 3.17.

In the city, the population was spread out, with 23.5% under the age of 18, 14.4% from 18 to 24, 32.3% from 25 to 44, 22.6% from 45 to 64, and 7.2% who were 65 years of age or older.
The median age was 33 years.
For every 100 females, there were 93.8 males.
For every 100 females age 18 and over, there were 90.0 males.

According to 2007 Census Bureau estimates, the median income for a household in the city was $98,923, and the median income for a family was $111,455; these numbers make Irvine the seventh richest city in the US, among cities with population 65,000 or higher.
9.1% of the population and 5.0% of families were below the poverty line.
Of the total population, 6.1% of those under the age of 18 and 5.6% of those 65 and older were living below the poverty line.

In 2006, the median gross rent paid for housing was $1,660 a month.
This was the highest of any place in the United States of more than 100,000 people.

The skyrocketing high cost of housing is a major issue in Irvine and Orange County, as the city council faces pressure to approve future income-subsidized housing projects to meet the demands of working-class citizens.
The census of 2000 found there were 143,072 people, 51,199 households, and 34,354 families in the city. The population density was 3,098.0 inhabitants per square mile (1,196.2/km²), as of the census. There were 53,711 housing units at an average density of 1,163.0 per square mile (449.1/km²). The racial makeup of the city was 61.1% White, 7.4% of the population were Hispanic or Latino of any race, 1.5% Black or African American, 0.2% Native American, 29.8% Asian, 1.1% Pacific Islander, 2.5% from other races, and 4.8% from two or more races.
There were 51,199 households, out of which 36.0% had children under the age of 18 living with them, 53.8% were married couples living together, 9.8% had a female householder with no husband present, and 32.9% were non-families. 22.8% of all households were made up of individuals, and 5.0% had someone living alone who was 65 years of age or older. The average household size was 2.70 persons and the average family size was 3.17.
In the city, the population was spread out, with 23.5% under the age of 18, 14.4% from 18 to 24, 32.3% from 25 to 44, 22.6% from 45 to 64, and 7.2% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 93.8 males. For every 100 females age 18 and over, there were 90.0 males.
According to 2007 Census Bureau estimates, the median income for a household in the city was $98,923, and the median income for a family was $111,455; these numbers make Irvine the seventh richest city in the US, among cities with population 65,000 or higher. 9.1% of the population and 5.0% of families were below the poverty line. Of the total population, 6.1% of those under the age of 18 and 5.6% of those 65 and older were living below the poverty line.
In 2006, the median gross rent paid for housing was $1,660 a month. This was the highest of any place in the United States of more than 100,000 people.
The skyrocketing high cost of housing is a major issue in Irvine and Orange County, as the city council faces pressure to approve future income-subsidized housing projects to meet the demands of working-class citizens.
Irvine, California