33813 ZIP Code, Lakeland, FL

33813 is a ZIP code in Lakeland, Florida in Polk County. It covers 21 square miles of land. The closest ZIP codes are 33812, 33803 and 33840. 38,674 people live here in 13,976 households. At about 1,841 people per square mile it has suburban density, and most homes are owner-occupied (79%). Median household income is $99,497, above the Florida median of $74,568.

Quick facts

Key figures

MeasureValue
Residents38,674
Households13,976
Median household income$99,497
Income per person$47,665
Median age39.8
Homeowners79.0%
Median home value$366,300
Median rent$1,630
Bachelor's degree or higher41.3%
Average commute (minutes)25.5
Households with kids under 1836.4%
Moved in the past year14.8%
Below the poverty line9.0%
Broadband internet96.6%
Speak a non-English language at home16.9%

Household income

% of householdsValue
<$10K3.3%
$10–15K1.9%
$15–25K4.8%
$25–35K4.9%
$35–50K9.1%
$50–75K12.5%
$75–100K13.7%
$100–150K20.3%
$150–200K12.7%
$200K+16.8%

Age

% of all residentsValue
<1013.6%
10–1914.7%
20–245.2%
25–348.8%
35–4414.1%
45–5412.5%
55–6412.5%
65–7411.4%
75+7.0%

Tenure

% of housing unitsValue
Owned, with mortgage49.3%
Owned outright25.1%
Rented19.3%
Vacant6.2%

Type of building

% of housing unitsValue
Detached house81.5%
Townhome4.5%
2–4 units3.7%
5–19 units3.6%
20+ units4.3%
Mobile / other2.5%

Businesses in 33813

1,073 business establishments with 11,834 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

33813 has 23 USPS carrier routes with 14,769 residential and 914 business mailboxes. Open the EDDM route map.

Carrier routes in 33813

33813 has 23 USPS carrier routes (11 city (C), 11 rural (R), 1 highway contract (H)) with 14,769 residential and 914 business mailboxes. Routes range from 176 homes (C078) to 1,065 homes (C066); the median route has 645 homes. The Census counted 13,976 households in 33813 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2491
250–4992
500–74916
750–9993
1,000–1,4991
1,500+0

Best routes in 33813 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

  1. Route C044 — USPS business mailboxes 249, 664 homes
  2. Route C020 — USPS business mailboxes 195, 509 homes
  3. Route C046 — USPS business mailboxes 175, 381 homes
  4. Route C060 — USPS business mailboxes 74, 792 homes
  5. Route C077 — USPS business mailboxes 71, 729 homes

Select these 5 routes on the route map

Every carrier route in 33813

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C016City64530$111,705———
C020City509195$70,114———
C044City664249$107,848———
C046City381175$54,472———
C057City8270$85,343———
C059City5431$124,716———
C060City79274$54,472———
C066City1,0658$117,220———
C072City6395$124,716———
C077City72971$62,961———
C078City1760$54,472———
H099Highway contract6561$125,987———
R001Rural86215$70,114———
R008Rural6243$107,848———
R018Rural6181$125,987———
R022Rural6022$102,685———
R026Rural7223$133,275———
R042Rural6868$125,987———
R054Rural62613$70,114———
R065Rural6181$107,848———
R081Rural6902$133,275———
R095Rural66318$119,352———
R103Rural43239$119,352———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 33813 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

Areas that include 33813

Where it ranks

Mail every home in 33813

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 33813, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 33813 in?
33813 is a Lakeland, FL mailing address. By land area, 23% lies inside Lakeland Highlands, 19% lies inside Lakeland, 6% lies inside Highland City and 3% lies inside Medulla; the rest is outside any Census-defined city or community.
What county is 33813 in?
33813 is in Polk County.
What is the population of 33813?
About 38,674 people (±1,942), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 36,448.
What is the median household income in 33813?
$99,497 (±$6,973), compared with $74,568 for Florida as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 33813?
23 USPS carrier routes with 14,769 residential and 914 business mailboxes (15,681 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 33813?
The closest, measured center to center: 33812 (2.6 mi, Highland City), 33803 (4.4 mi, Lakeland), 33840 (4.5 mi), 33811 (5.9 mi, Lakeland), 33801 (6.3 mi, Lakeland) and 33815 (7.8 mi, Lakeland).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.