Is St. Johns County, FL's population growing or shrinking?
Refreshed annually
It grew by 13,000 between 2024 and 2025, the 24th-most among all counties in the US. Changes in population reflect birth and death rates, immigration patterns, regional shifts, and even the overall health of the economy. St. Johns County, FL’s 3.9% annual increase was primarily driven by people moving from other states.
In the decade between 2015 and 2025, St. Johns County, FL’s population grew by 52.8%.
+13K
population change (2024 to 2025)
+3.9%
percent change in population (2024 to 2025)
Since 2000, St. Johns County, FL’s population increased 25 out of 25 years. The largest increase occurred between 2020 and 2021, when St. Johns County, FL gained 16,200 residents. Its smallest increase occurred between 2009 and 2010 when there were 4,000 more residents.
St. Johns County, FL gained 13,000 residents between 2024 and 2025.
Annual population change, 2001–2025
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What contributes to population change in St. Johns County, FL?
A county’s population is influenced by three factors:
- Natural population change: If births outnumber deaths in a given year, natural population growth is positive. If deaths exceed births, it is negative. Between 2024 and 2025 natural population change was positive in St. Johns County, FL, with births exceeding deaths by 126.
- Immigration: international migration directly into or out of a county: If more people move in than move out, population change from immigration is positive. If more people move out than move in, it’s negative. Between 2024 to 2025, St. Johns County’s population change from immigration was positive with about 460 more people coming from another country directly to St. Johns County than leaving.
- Domestic migration, moving between counties: Between 2024 to 2025, St. Johns County’s population change from domestic migration was positive with about 12,500 more people coming from any other county in the US.
Between 2024 and 2025, domestic migration was the primary driver of population growth in St. Johns County, FL.
Components of population change from previous year, 2011–2025
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
