# Nassau County, Florida: Power, Data Centers and the Local Economy Home to Fernandina Beach, Hilliard and Callahan Local rules on data centers are on the record in Nassau County. Construction employs 1,937, up 43.0% since 2019, and construction is 1.3 times as concentrated here as in the U.S. economy. Nassau County is home to Fernandina Beach, Hilliard and Callahan. The Moratorium Tracker holds 1 local measure here (1 in force); the latest is “Up to 12-month data center moratorium”. Employers here counted 27,745 jobs in 2025, up 17.1% from 2019. Unemployment was 4.6% in August 2026, against 3.0% in 2019. +17.1% total jobs since 2019, now 27,745 1.3× the U.S. share of jobs in construction 310 MW of operating power plants, mostly solar ## Cities and towns in Nassau County Nassau County is home to Fernandina Beach, Hilliard and Callahan. Fernandina Beach13,869 residents Hilliard3,161 residents Callahan1,830 residents Unincorporated communities (governed by the county): Nassau Village-Ratliff, Yulee. Residents are 2025 Census estimates for the part of each city, town or township inside this county. Census publishes no annual estimate for unincorporated communities. ## What changed in Nassau County | Measure | Then | Now | Change | Rank in Florida | |---|---|---|---|---| | Population (2020 → 2025) | 91,040 | 106,879 | ▲ 17.4% | 37th of 67 by size | | Total jobs (2019 → 2025) | 23,694 | 27,745 | ▲ 17.1% | 11th of 67 by growth | | Average annual pay (2019 → 2025) | $42,373 | $59,156 | ▲ 39.6% | — | | Construction jobs (2019 → 2025) | 1,355 | 1,937 | ▲ 43.0% | 8th of 59 by growth | | Unemployment rate (2019 → August 2026) | 3.0% | 4.6% | ▲ 1.6pts | — | | Generating capacity added since 2019 | — | 149 MW | | — | | Generating capacity retired since 2019 | — | 0 MW | | — | 106,879 people live here, up 17.4% since 2020. 149 MW of that came online in 2019 or later, mostly solar. Its power plants have 310 MW of capacity, 48% of it solar. Electrical contractors employ 174, at an average $48,385 a year. Florida Power & Light Co is the largest utility serving Nassau County, one of 4 with territory here. Its residential customers paid an average 13.71¢/kWh in 2024. ## Who powers Nassau County ### Utilities with service territory in Nassau County | Utility | Ownership | Service | Residential customers (systemwide) | Residential price, 2024 | Commercial share of sales | |---|---|---|---|---|---| | Florida Power & Light Co | Investor Owned | Bundled | 5,236,277 | 13.71¢ | 41% | | JEA | Municipal | Bundled | 470,564 | 12.43¢ | 32% | | Florida Public Utilities Co | Investor Owned | Bundled | 25,560 | 18.01¢ | 44% | | Okefenoke Rural El Member Corp | Cooperative | Bundled | 11,088 | 13.95¢ | 8% | Customer counts, prices and sales shares cover each utility's whole system in the state, not only this county. Commercial sales include data centers. ### Operating power plants | Technology | Capacity | Share | |---|---|---| | Solar | 149 MW | 48% | | Other technologies | 139 MW | 45% | | Natural gas | 22 MW | 7% | | Largest plants | Owner | Technology | MW | Since | |---|---|---|---|---| | Fernandina Beach Mill | WestRock, Fernandina Beach | Other technologies | 97 MW | 1982 | | Nassau Solar Center | Florida Power & Light Co | Solar | 74 MW | 2020 | | Thomas Creek | Florida Power & Light Co | Solar | 74 MW | 2025 | | Fernandina Plant | Rayonier Advanced Materials | Other technologies | 42 MW | 1950 | | Eight Flags Energy | Eight Flags Energy LLC | Natural gas | 22 MW | 2016 | ## The Nassau County labor market | Industry (2025) | Jobs | Average pay | Concentration vs U.S. | |---|---|---|---| | All industries | 27,745 | $59,156 | 1.00 | | Construction | 1,937 | $57,330 | 1.32 | | Electrical contractors | 174 | $48,385 | 0.87 | | Data processing and hosting | 54 | $76,024 | 0.63 | Concentration is the BLS location quotient: 1.0 means the industry holds the same share of local jobs as it does nationally. Industry rows count private employers; cells BLS suppresses are left out. ## Data centers and local rules in Nassau County ### Local measures | Measure | Status | Date | |---|---|---| | Up to 12-month data center moratorium | In force | 2026 | ## Nassau County and its neighbors Of the 4 counties that border Nassau County, Duval County carries the most build-out activity: data centers, planned generation and operating plants combined. [[[[ | County | Population | Jobs since 2019 | Operating MW | Planned MW | Data centers | Local measures | |---|---|---|---|---|---|---| | Nassau County | 106,879 | ▲ 17.1% | 310 MW | — | — | 1 | | Baker County](https://savrn.com/power-supply-chain-map/florida/baker-county) | 29,737 | ▼ 1.5% | 298 MW | 74 MW | — | — | | Camden County](https://savrn.com/power-supply-chain-map/georgia/camden-county) GA | 60,143 | ▲ 12.6% | 60 MW | — | 1 | 1 | | Charlton County](https://savrn.com/power-supply-chain-map/georgia/charlton-county) GA | 13,121 | ▲ 12.8% | 2 MW | — | — | — | | Duval County](https://savrn.com/power-supply-chain-map/florida/duval-county) | 1,062,963 | ▲ 7.0% | 3,054 MW | 174 MW | 14 | — | ## More of Florida [All Florida countiesThe state power page and county mapOpen →](https://savrn.com/power-supply-chain-map/florida)[Duval County1,062,963 peopleOpen →](https://savrn.com/power-supply-chain-map/florida/duval-county)[Baker County29,737 peopleOpen →](https://savrn.com/power-supply-chain-map/florida/baker-county) ## Nassau County, answered from the record ### Who provides electricity in Nassau County, Florida? 4 utilities have service territory in Nassau County in the EIA-861 2024 report: Florida Power & Light Co, JEA, Florida Public Utilities Co, Okefenoke Rural El Member Corp. The largest, Florida Power & Light Co, charged residential customers 13.71¢/kWh on average in 2024. ### What county is Fernandina Beach, FL in? Fernandina Beach is in Nassau County, Florida. About 13,869 people live there (2025 Census estimate). ### What power plants are in Nassau County? 5 operating plants with 310 MW of capacity. The largest is Fernandina Beach Mill (97 MW, other technologies). ### Are there data centers in Nassau County? The SAVRN Data Center Map has no data center in Nassau County. The nearest activity on record is next door in Duval County. ### Is Nassau County adding jobs? Employers counted 27,745 jobs in 2025 against 23,694 in 2019 (+17.1%, BLS QCEW). Construction went from 1,355 to 1,937. ### Does Nassau County have a data center moratorium? The SAVRN Moratorium Tracker holds 1 local measure for Nassau County, 1 in force. --- Canonical: https://savrn.com/power-supply-chain-map/florida/nassau-county Updated: 2026-10-08. Refreshed weekly by SAVRN from EIA, BLS, BEA, Census and the SAVRN trackers. License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/).