The 2014 St. Augustine, Florida, population is 13,113. There are 1,391 people per square mile (population density).
The median age is 43.5. The US median is 37.2. 36.60% of people in St. Augustine, Florida, are married. 15.50% are divorced.
The average household size is 2.16 people. 14.12% of people are married, with children. 19.75% have children, but are single.
82.65% of people are white, 15.28% are black, 0.89% are asian, 0.18% are native american, and 0.18% claim 'Other'.
4.61% of the people in St. Augustine, Florida, claim hispanic ethnicity (meaning 95.39% are non-hispanic).