According to 2006 Census Bureau estimates, the population of the town is 24,669. Fountain Hills was the eighth fastest-growing place among all cities and towns in Arizona between the 1990 and 2000 census. In contrast to neighboring Scottsdale, some homes in Fountain Hills are widely spaced, in a more rural setting. Fountain Hills is home to the world's fourth tallest fountain, and neighbors the Fort McDowell Indian Reservation. Charles W. Juels' Fountain Hills Observatory is situated nearby. The town also holds two annual fairs, a local art fair and the Fountain Hills Great Fair which incorporates arts and a carnival. The town also claims to have the only thanksgiving day fair west of the Mississippi River.
The current Mayor of Fountain Hills is Jay Schlum, elected in Mar 2008. The current Town Council consists of the Mayor and six Councilmembers: Vice Mayor Henry Leger, Councilmembers Keith McMahan, Mike Archambault, Dennis Contino, Ginny Dickey and Cassie Hansen. Rick Davis is the Town Manager. Among other council appointed staff are Town Attorney Andrew McGuire and Town Magistrate Ted Armbruster.
The town does not have its own law enforcement. They are patrolled by the Maricopa County Sheriff's office with the elected Sheriff Joe Arpaio, who also lives within the town.
According to the United States Census Bureau, the town has a total area of 18.2 square miles (47.2 km²), of which, 18.2 square miles (47.1 km²) of it is land and 0.1 square miles (0.1 km²) of it (0.27%) is water.
There were 8,653 households out of which 23.5% had children under the age of 18 living with them, 66.7% were married couples living together, 6.1% had a female householder with no husband present, and 24.7% were non-families. 19.9% of all households were made up of individuals and 7.8% had someone living alone who was 65 years of age or older. The average household size was 2.34 and the average family size was 2.67.
In the town the population was spread out with 18.5% under the age of 18, 4.4% from 18 to 24, 24.6% from 25 to 44, 33.3% from 45 to 64, and 19.2% who were 65 years of age or older. The median age was 46 years. For every 100 females there were 93.4 males. For every 100 females age 18 and over, there were 91.1 males.
The median income for a household in the town was $61,619, and the median income for a family was $68,185. Males had a median income of $50,324 versus $32,307 for females. The per capita income for the town was $32,230. About 2.2% of families and 4.1% of the population were below the poverty line, including 5.0% of those under age 18 and 3.8% of those age 65 or over.
The inner walking path that surrounds the fountain is approximately 1.25 miles in distance