Residential delivery area · Florida
ZIP Code 33584: Seffner, FL
ZIP code 33584 uses the postal name Seffner, Florida and lies entirely in Hillsborough County (Census 2020 ZIP-county file). About 29,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $72,267 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Thonotosassa (47%), Seffner (19%), Mango (17%) and Brandon (12%); 5% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Seffner · its only residential ZIP
- County
- Hillsborough County
- Census places
- Thonotosassa (47%) census-designated place; Seffner (19%) census-designated place; Mango (17%) census-designated place; Brandon (12%) census-designated place
- Metro area
- Tampa-St. Petersburg-Clearwater, FL
- House district
- FL-15 119th Congress
- State
- Florida
- Time zone
- Eastern
- Land area
- 19.2 sq mi · 1,489 people per sq mi
- PO Box ZIPs
- 33583 also use the name Seffner
Where is ZIP code 33584?
33584 centers on 28.005°, -82.294° and covers 19.2 square miles of land plus 0.7 of water. It borders 7 ZIP codes: 33550, 33510, 33637, 33610, 33527, 33594, 33592.
The map draws ZIP code areas only. For the streets inside 33584, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 33584 compare with the rest of Hillsborough County?
| Measure | 33584 | In Hillsborough County | In FL |
|---|---|---|---|
| People (ACS 2020-2024) | 28,579 | 26th of 58 | 328th of 1,013 |
| Median household income | $72k | 36th of 53 | 439th of 819 |
| Median home value | $311k | 38th of 53 | 503rd of 833 |
Its median household income is higher than in 50% of U.S. residential ZIP codes, and it is denser than 82% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 33584?
The 2020 Census counted 27,503 people in 33584; the ACS, which samples households over 2020-2024, estimates 28,579. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 28,579
- 2020 Census count
- 27,503
- Households
- 10,462
- Median age
- 42.3
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 33584?
Of the 28,579 people the ACS estimates in 33584, 21.7% are under 18 and 16.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (51.8%), then Hispanic or Latino (25.7%).
- Under 1821.7%
- 18 to 6461.4%
- 65 and older16.9%
- White, not Hispanic51.8%
- Hispanic or Latino25.7%
- Black, not Hispanic12.9%
- Asian, not Hispanic5.3%
- Other or two or more4.3%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 33584 earn?
Median household income is $72,267 (ACS 2020-2024), the 36th highest of the 53 ranked ZIP codes in Hillsborough County.
- Median household income
- $72,267
- Income per person
- $36,959
- Below the poverty line
- 11.3%
- Unemployed (of the labor force)
- 4.4%
- Adults 25+ with a bachelor's degree
- 25.7%
- Adjusted gross income per tax return, 2022
- $63,94614,040 returns; wages 74% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 33584?
FHFA's house price index for 33584, built from repeat sales and appraisals of the same homes, rose 149% from 2015 to 2025 and rose 69% from 2020 to 2025, and moved +2.3% in 2025.
- Median home value (owners' estimate)
- $311,300
- Median gross rent
- $1,502
- Homes owned by their occupants
- 75.3%
- Housing units
- 11,123
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 33584?
517 business establishments had a location in this ZIP code in 2023, 93 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction103
- Retail trade79
- Accommodation and food services52
- Other services (except public administration)41
- Administrative and support and waste management and remediation services40
- Health care and social assistance39
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 33584?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 33550 | Mango | 0 | – | 2.0 mi |
| 33510 | Brandon | 30,578 | $74k | 3.5 mi |
| 33637 | Tampa | 17,658 | $63k | 5.0 mi |
| 33610 | Tampa | 46,587 | $54k | 5.1 mi |
| 33527 | Dover | 17,364 | $81k | 5.4 mi |
| 33594 | Valrico | 37,361 | $97k | 5.5 mi |
| 33592 | Thonotosassa | 12,333 | $69k | 6.7 mi |
| 33617 | Tampa | 47,851 | $51k | 6.4 mi (near) |
| 33511 | Brandon | 62,138 | $81k | 6.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.
Which other ZIP codes use the name Seffner?
1 more ZIP code carries the postal name Seffner, FL without a residential delivery area: PO boxes at the post office, or a single organization with its own ZIP code. The Census Bureau publishes no figures for it.
| ZIP | County |
|---|---|
| 33583 | Hillsborough County |
Source: GeoNames postal codes (CC BY 4.0), downloaded 2026-10-09; a ZIP code with no Census ZCTA has no residential delivery area.