What to know about ZIP 31521
ZIP code 31521 covers ZIP 31521 with a population of about 3,847.
At a glance, the area shows median age of 31.1 versus a U.S. median of about 38.9.
It sits in the JACKSONVILLE media market.
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ZIP Code 31521 — undefined, undefined Demographics & Data
Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.
Low Income Area
At a glance
Population
3,847
Density
N/A
Median income
$34,114
-55% vs US avg
Home value
$72,100
-79% vs US avg
Median rent
$613
-47% vs US avg
Timezone
N/A
Overview of ZIP Code 31521
Income and economy in ZIP 31521
Median household income in ZIP 31521 is about $34,114 — about 55% below the U.S. median ($75,149).
On socioeconomic markers, US5 shows a poverty rate of 30.0%; unemployment rate near 14.0%; 12.6% of adults with a bachelor’s degree or higher (about 21.1 points below the national share (33.7%)).
Labor and commute patterns include leading industry context around Retail trade, Education, and Administrative support; about 2.0% of workers reporting work-from-home (about 13.2 points below the U.S. share (15.2%)); a mean commute of about 180.0 minutes (U.S. average near 26.8).
Housing and affordability in ZIP 31521
Median home value is about $72,100 — about 79% below the U.S. median home value ($348,079).
Housing tenure and rents show median gross rent around $613 (about 47% below the U.S. median rent ($1,163)), and owner-occupancy near 27.1% (about 38.3 points below the national owner-occupancy rate (65.4%)).
To comfortably buy a median-priced home in ZIP 31521, a household would need roughly $20,000 in annual income under a 20% down, 30-year loan at 6.8% (illustrative), keeping housing costs near 28% of income. Estimated monthly PITI is about $463. That sits below the local median household income ($34,114), suggesting the typical household income is closer to a workable buy-in level under these assumptions. Rates, taxes, insurance, and HOA fees vary — treat this as a planning estimate, not a lender quote.