Most of Jacksonville is in Duval County. Some of its zipcodes are in St. Johns.
Jacksonville is in North Eastern Florida. It's population as recorded in the 2010 Census was 821,784.
The median age for residents of Jacksonville is 35.5. Around 33.4% of Jacksonville households include school aged children and 20.9% of households include individuals aged 65 years or over. Census records indicate 59.4% of the Jacksonville population are White, 30.7% are Black or African American, .3% American Indian, 4.2% Asian and 2.8% are Two or more Races.
There are 366,273 housing units in Jacksonville. 43,167 (11.7%) of these were reported as vacant in the 2010 Census. There are 144,146 residential rental units in Jacksonville. 123,728 of them were occupied in 2010 providing a residential rental vacancy rate of 13.8%.