Racial and ethnic composition 2020 census As of the
2020 census, Coronado had a population of 20,192, with a population density of . The census reported that 86.5% of the population lived in households, 13.1% lived in non-institutionalized group quarters, and 0.5% were institutionalized. There were 7,384 households, out of which 28.7% included children under the age of 18, 55.2% were married-couple households, 3.5% were
cohabiting couple households, 14.3% had a male householder with no spouse or partner present, and 27.0% had a female householder with no spouse or partner present. About 28.1% of households were one person, and 14.5% were one person aged 65 or older. The average household size was 2.36, and there were 4,931
families (66.8% of all households). The age distribution was 18.3% under the age of 18, 17.2% aged 18 to 24, 20.7% aged 25 to 44, 22.7% aged 45 to 64, and 21.0% aged 65 or older. The median age was 38.8 years. For every 100 females, there were 108.3 males, and for every 100 females age 18 and over, there were 110.1 males age 18 and over. According to a 2023 estimate, the median income for a household in the city was $135,056, and the median income for a family was $161,300. The
per capita income was $79,771. Real estate in the city of Coronado is very expensive. According to a recent county-wide ZIP code chart published in
The San Diego Union-Tribune in August 2006, the median cost of a single-family home within the city's ZIP code of 92118 was $1,605,000. In 2010, Forbes.com found that the median home price in Coronado had risen to $1,840,665. By 2023, the median home value was $2.2 million, with more than a quarter of households earning more than $200,000. ==Government and politics==