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US ZIP Code Profile

ZIP Code 33811
Lakeland, Florida

ZIP code 33811 is in Lakeland, located in Polk County, Florida, within the Lakeland-Winter Haven metro area. Its 2020 Census population was 24,249. The estimated median adjusted gross income per tax return is $51,218, and about 5% of filers report $200,000 or more.

2020 Population
24,249
Census ZCTA
County
Polk
FIPS 12105
Median income (est.)
$51,218
IRS SOI 2022
Land Area
27.815 mi²
+ 0.252 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityLakeland, FL
CountyPolk County (FIPS 12105)
StateFlorida (FIPS 12)
Metro Area (MSA)Lakeland-Winter Haven, FL Metro Area (29460)
Census Region / DivisionSouth Region · South Atlantic Division
Coordinates27.988253, -82.01568
Land / Water Area27.815 mi² land · 0.252 mi² water

02Income & Economics

Distribution of the 13,750 individual tax returns filed in 33811 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
24.3%
$25K–$50K
24.9%
$50K–$75K
17.2%
$75K–$100K
11.3%
$100K–$200K
17.8%
$200K+
4.5%
The $200,000+ bracket accounts for 25% of 33811's total adjusted gross income, from 5% of returns — a concentration that drives the gap between the median ($51,218) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 33811's IRS income metrics, 2020–2022.

Median income (2021→2022)
$51,218
▲ 6.3%
Filers earning $200K+
4.5%
▲ 0.7 pt
Total filers
13,750
▲ 4.2%
GET /zipc/v2/zipcodes/33811/soi?year=… $45K 2020 $48K 2021 $51K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 33811 ZCTA.

2000
16,176
 
2010
20,980
▲ +29.7%
2020
24,249
▲ +15.6%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number114920
City AliasesLakeland

06Frequently Asked Questions

What county is ZIP code 33811 in?

ZIP code 33811 is in Polk County, Florida (county FIPS code 12105).

What city is ZIP code 33811?

The primary USPS city for 33811 is Lakeland, FL.

What metro area (MSA) is 33811 in?

33811 is part of the Lakeland-Winter Haven, FL Metro Area (MSA code 29460).

What is the population of ZIP code 33811?

The 2020 Census population of 33811 was 24,249 residents.

What is the median income in ZIP code 33811?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 33811 is about $51,218, with around 5% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.