As of the census of 2000, there were 31,178 people, 10,895 households, and 7,942 families residing in the city. The population density was 4,911.1 inhabitants per square mile. There were 11,303 housing units at an average density of 1,780.4 per square mile. The racial makeup of the city was 76.83% White, 1.38% African American, 0.44% Native American, 10.20% Asian, 0.15% Pacific Islander, 7.19% from other races, and 3.81% from two or more races. Hispanic or Latino of any race were 16.40% of the population.
There were 10,895 households out of which 37.5% had children under the age of 18 living with them, 61.0% were married couples living together, 8.5% had a female householder with no husband present, and 27.1% were non-families. 21.6% of all households were made up of individuals and 10.0% had someone living alone who was 65 years of age or older. The average household size was 2.82 and the average family size was 3.29.
In the city the population was spread out with 26.2% under the age of 18, 7.3% from 18 to 24, 28.8% from 25 to 44, 25.4% from 45 to 64, and 12.1% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 92.6 males. For every 100 females age 18 and over, there were 89.0 males.
According to a 2007 estimate, the median income for a household in the city was $89,781, and the median income for a family was $102,191. Males had a median income of $59,144 versus $38,761 for females. The per capita income for the city was $36,133. About 3.6% of families and 5.0% of the population were below the poverty line, including 5.3% of those under age 18 and 5.1% of those age 65 or over.
The new Laguna Hills Civic Center and City Hall located off El Toro Road in the northernmost section of the city, near the Laguna Hills Mall and the Nellie Gail Ranch neighborhood.
Fire protection in Laguna Hills is provided by the Orange County Fire Authority with ambulance service by Doctor's Ambulance. Law enforcement is provided by the Orange County Sheriff's Department. There is also the Saddleback Memorial Medical Center, a hospital that is equipped with a full emergency room.
Laguna Hills is served by the Saddleback Valley Unified School District. Laguna Hills students attend a variety of high performing elementary schools, and for middle school attend either La Paz Intermediate School or Los Alisos Intermediate School in neighboring Mission Viejo. The city has its own high school, Laguna Hills High School, the smallest school in the district and one of the smallest in south Orange County with under 1,700 students.
Residents of Laguna Hills, California
- Chad Carvin (1974), American freestyle swimmer
- Russ Conway, actor
- Steve Perry, (1979) Pitcher for The Dodger Baseball Team
- Mike Hopkins (unknown), Syracuse Orange men's basketball assistant coach, and former player
- Kaitlin Sandeno (1983), Olympic medalist swimmer
- Michael Novales (1985), Former US Figure Skating competitor, currently skating for Philippine Skating Union
- Whitney Houston, Actress and Grammy awarded singer
- Jenna Haze (1982), American pornographic actress
- Carson Palmer (1998), NFL quarterback and Heisman Trophy winner for the University of Southern California
- Fieldy (Current Resident), Bassist for the band Korn, Recording Artist
- Steve Gibson, computer programmer and co-host of Security Now
- George Sixta, Cartoonist of the syndicated Rivets (1953–1985)
- Zacky Vengeance (Current Resident), Rhythm Guitarist for the band Avenged Sevenfold