390,670 people (2024 Census estimate, +17.9% since 2020)
572 square miles of land · 683 people per square mile
“Highest” and “lowest” are just order, not grades: a high rank for poverty or hazard losses means more of it. Each figure's source is in its section below.
20 active community water systems list St. Lucie County in the area they serve, reporting 327,992 people served in all (a system that crosses county lines counts its whole population).
| PORT ST LUCIE UTILITIES groundwater · local government · FL4560954 | 224,485 served |
| FT. PIERCE UTILITIES AUTHORITY groundwater · local government · FL4560490 | 58,000 served |
| ST. LUCIE WEST SERVICES DISTRICT groundwater · public/private · FL4565031 | 21,400 served |
| ST LUCIE COUNTY UTIL NORTH COUNTY SYSTEM groundwater · private · FL4561689 | 5,073 served |
| NORTH HUTCHINSON ISLAND buys groundwater · private · FL4560971 | 3,954 served |
| SPANISH LAKES FAIRWAYS groundwater · private · FL4565043 | 3,120 served |
| NETTLES ISLAND buys groundwater · private · FL4565198 | 3,056 served |
| INDIAN RIVER ESTATES buys groundwater · local government · FL4565204 | 2,365 served |
Source: U.S. EPA Safe Drinking Water Information System (SDWIS), active community systems, . Look up any system's violations and test results with EPA's search using its ID.
About 1,233 people were held in St. Lucie County's jail, in Vera's latest figure (2026). In 2021 it was about 1,632.
Source: Vera Institute of Justice, Incarceration Trends (built from federal Bureau of Justice Statistics jail surveys). Counties without their own jail, or that share one, may show no figure.
1 school district has its office in St. Lucie County. School taxes are usually the largest part of a property tax bill.
Spent $598.9 million — $556 million to run schools, about $12,177 per student, plus $33.3 million on buildings and equipment. Money in: $328.3 million local (mostly property tax), $229.6 million state, $109.8 million federal. Long-term debt: $185.6 million.
Source: U.S. Census Bureau, 2023 Annual Survey of School System Finances. Districts are listed by the county of their main office; some serve neighboring counties too.
Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute), which gathers federal data (CDC, Census, and others); measures cover different recent years. Blank lines aren't reported for small counties.
Overall risk: Relatively High compared with other U.S. counties. FEMA estimates natural hazards cost St. Lucie County about $193.4 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
150 bridges in St. Lucie County: 109 in good condition, 37 fair, and 4 poor (2.7%). “Poor” means a main part — the deck, the beams, or the supports — is rated 4 or lower on the federal 0–9 scale. It doesn't mean unsafe to drive; unsafe bridges are closed.
| SR-A1A over Intracoastal Waterway · built 1963 | 7,100 vehicles a day |
| SR-A1A (Ocean Dr.) over Big Mud Creek · built 1965 | 3,800 vehicles a day |
| SR-A1A (Ocean Dr.) over Blind Creek · built 1965 | 3,800 vehicles a day |
| CR605 OLD DIXIE HW over TAYLOR CREEK · built 1962 | 0 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $54.6 million of work in St. Lucie County in fiscal 2025, about $166 per resident — to the county, cities, schools, hospitals, nonprofits and others.
Source: USAspending.gov, grants by place of performance, fiscal 2025 (Oct. 2024 to Sept. 2025). Search it by county to see each award.
From Grants.gov: posted grants listing county governments as eligible, soonest deadline first; research-only and overseas programs left out; list updated 2026-10-13, refreshed weekly. 62 are open in all. Cities, towns, school districts and nonprofits have their own lists there.
General election: Tuesday, November 3, 2026. Last day to register to vote: 2026-10-05. Vote-by-mail request due by 5 pm: 2026-10-22. Early voting — the statewide minimum: 2026-10-24 to 2026-10-31. Election Day — and mail ballots must arrive: 2026-11-03.
Source: Florida Division of Elections — election dates · WPTV, 2026 deadlines · Florida Division of Elections — early voting
The budget, property tax rates, audits, local officials and offices for St. Lucie County come from the county's own records, which we haven't gathered — not gathered, never hidden. See what a full county site looks like, or ask to have St. Lucie County built: brayden.ozark@gmail.com.
More of Florida: the state government and every county in Florida.
Nearby counties: Martin County (21 mi) · Indian River County (24 mi) · Okeechobee County (27 mi) · Palm Beach County (50 mi) · Glades County (54 mi) · Highlands County (55 mi).