Belleair Beach is a city in Pinellas County, Florida, United States. The population was 1,560 at the 2010 census.^[3]

There were 825 households out of which 13.7% had children under the age of 18 living with them, 59.9% were married couples living together, 3.9% had a female householder with no husband present, and 33.9% were non-families. 26.4% of all households were made up of individuals and 11.9% had someone living alone who was 65 years of age or older. The average household size was 2.12 and the average family size was 2.54.

In the city the population was spread out with 11.9% under the age of 18, 4.0% from 18 to 24, 20.0% from 25 to 44, 38.3% from 45 to 64, and 25.8% who were 65 years of age or older. The median age was 52 years. For every 100 females there were 101.0 males. For every 100 females age 18 and over, there were 98.2 males.

The median income for a household in the city was $63,529, and the median income for a family was $90,282. Males had a median income of $56,354 versus $46,583 for females. The per capita income for the city was $61,569. About 4.0% of families and 7.8% of the population were below the poverty line, including 10.6% of those under age 18 and 2.4% of those age 65 or over.

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