Coronado was featured in the 1960-1961 syndicated television series COronado 9, starring Rod Cameron as a private detective, Dan Adams, who operated from the San Diego area. COronado 9 refers to Adams' telephone exchange.
As of the 2000 census, there were 24,100 people, 7,734 households, and 4,934 families residing in the city. The population density was 1,205.3/km² (3,121.9/mi²). There were 9,494 housing units at an average density of 474.8/km² (1,229.8/mi²). The racial makeup of the city was 84.40% White, 5.15% African American, 0.66% Native American, 3.72% Asian, 0.30% Pacific Islander, 3.14% from other races, and 2.63% from two or more races. Hispanic or Latino of any race were 9.83% of the population.
There were 7,734 households out of which 27.0% had children under the age of 18 living with them, 54.0% were married couples living together, 7.4% had a female householder with no husband present, and 36.2% were non-families. 30.9% of all households were made up of individuals and 13.3% had someone living alone who was 65 years of age or older. The average household size was 2.27 and the average family size was 2.84.
In the city the population was spread out with 16.0% under the age of 18, 20.2% from 18 to 24, 29.3% from 25 to 44, 18.7% from 45 to 64, and 15.8% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 139.8 males. For every 100 females age 18 and over, there were 149.1 males.
48.2% of those age 25 and over have a Bachelor's degree or higher. According to a 2007 estimate, the median income for a household in the city is $80,132, and the median income for a family is $105,901. Males have a median income of $30,041 versus $33,828 for females. The per capita income for the city is $34,656. 5.0% of the population and 3.1% of families are below the poverty line. Out of the total population, 5.0% of those under the age of 18 and 1.9% of those 65 and older are living below the poverty line.
Like many other premiere locations in Southern California, real estate in the city of Coronado is very expensive. A small and very modest two bedroom home in the city can easily cost over $1,000,000. According to a recent County-Wide Zip Code chart published in the San Diego Union Tribune newspaper in August 2006, the median cost of a single-family home within the city's zip code of 92118 was $1,605,000, as of July 2006. This makes it the third most expensive place to live in San Diego County and one of the most expensive in the country, as it holds a spot within the top 20 most expensive cities in the United States.