Fleming Island by the Numbers: What the Census Says

The Shape of the Place

The Census Bureau reports 29,351 people living on Fleming Island. That is a small city, but it does not feel like one. The median age is 47.7 years, which is older than the national figure. This is a place where people settle, not a place where people pass through.

The island drew its name from George Fleming, an Irish immigrant who received a 1,000-acre land grant from the Spanish governor of East Florida in 1790. He called his plantation Hibernia, the Latin name for Ireland. That settlement still stands in name, a quiet reminder of what came first.

Housing and the Runways

There are 11,842 housing units on the island. Of those, 545 are vacant. A small number—132 units—are held for seasonal or recreational use. That is barely more than one percent of the housing stock. This is not a vacation market. These are homes.

The ground beneath them has a different history. In 1942, the Navy laid four asphalt runways here, operating NOLF Fleming Island. The airfield was built fast for a war that needed it. By the 1960s, it was already obsolete, too short for the jets that had replaced propeller planes. The runways sat decaying for decades. In the late 1990s, they were demolished so the neighbourhoods now standing there could be built. The streets run where aircraft once landed.

Money and Work

The median household income is $119,046. That is a high figure, roughly double the national median. The unemployment rate is 1.8 percent, which is effectively full employment. If you live here, you likely work, and you likely work somewhere that pays.

Nearly half of residents—47.9 percent—hold a bachelor's degree or higher. That tracks with the income. This is a professional population, commuting to Jacksonville or working remotely from homes built over old runways.

The median home value is $387,400. For a suburb of Jacksonville, that is not cheap. The median gross rent is $1,918 per month. Both figures suggest a housing market with limited inventory and steady demand. People pay to live here, and they stay.

What the Numbers Do Not Say

The census can tell you income and education levels. It can tell you how many units sit empty. It cannot tell you what it feels like to drive over a street named for a Navy pilot, or to pass the Hibernia sign and think of an Irish soldier's grant.

The St. Johns River shoreline anchors the island, about 21 miles southwest of downtown Jacksonville. The river is the constant. The plantation came, then the Navy, then the builders. Each layer replaced the one before it, but none of them erased what was there.

The data describes a wealthy, educated, older suburb. That is true, as far as it goes. It is also true that this land was granted to a soldier for service to a Spanish crown, that its name is Latin for Ireland, and that the quiet streets were once a loud airfield. The census counts the people. It does not count the history they walk over every day.

The Numbers Hold

Fleming Island is not a boomtown. It is not in decline. It is a mature community with stable housing, low vacancy, and high employment. The seasonal units are negligible. The vacancy rate is low. The age skews older, which means the schools may be quieter than they once were, and the golf courses busier.

The 545 vacant units are worth watching. In a market this tight, vacancies tend to be transitional—houses between owners, apartments between tenants. They are not a sign of trouble. They are the churn of a place where people move in and out slowly.

The 132 seasonal homes are a curiosity. On an island with this much history and this much riverfront, you might expect more. But the numbers say otherwise. Fleming Island is not a second-home destination. It is a primary residence, a place where people live year-round, often for decades.

The Last Layer

Every census is a snapshot. This one shows a community of nearly 30,000 people, well-off and well-educated, living in homes built in the last few decades. The older layers are harder to see in the data.

The plantation is gone. The airfield is gone. What remains is the name—Fleming on the island, Hibernia in the settlement. The runways were demolished so the houses could rise. The streets were laid over the asphalt. The census counts the results, not the process.

That is the quiet truth of this place. The numbers are clean and current. The ground underneath them is anything but.