What city is 33778 in?

33778 is a Largo, FL mailing address. By land area, 31% lies inside Largo, 16% lies inside Ridgecrest and 15% lies inside Seminole; the rest is outside any Census-defined city or community.

What is the population of 33778?

About 16,807 people (±1,741), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 15,068.

What is the median household income in 33778?

$65,355 (±$4,816), 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 33778?

8 USPS carrier routes with 7,523 residential and 370 business mailboxes (7,897 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 33778?

The closest, measured center to center: 33774 (1.8 mi, Largo), 33770 (1.9 mi, Largo), 33771 (2.7 mi, Largo), 33773 (2.7 mi, Pinellas Park), 33772 (3.1 mi, Seminole) and 33785 (3.1 mi, Indian Rocks Beach).

33778 ZIP Code, Largo, FL

33778 is a ZIP code in Largo, Florida in Pinellas County. It covers 3.8 square miles of land. The closest ZIP codes are 33774, 33770 and 33771. 16,807 people live here in 6,836 households. At about 4,466 people per square mile it is built up to city-neighborhood density, and most homes are owner-occupied (83%). Median household income is $65,355, below the Florida median of $74,568; the median age is 51.2, older than most ZIP codes.

Quick facts

Mailing city: Largo, FL
County: Pinellas County
Land area: 3.8 sq mi
Population: 16,807
Median household income: $65,355
Carrier routes: 8 (7,523 homes)

Key figures

Measure	Value
Residents	16,807
Households	6,836
Median household income	$65,355
Income per person	$36,455
Median age	51.2
Homeowners	82.9%
Median home value	$291,600
Median rent	$1,811
Bachelor's degree or higher	27.8%
Average commute (minutes)	24
Households with kids under 18	18.0%
Moved in the past year	13.3%
Below the poverty line	11.8%
Broadband internet	87.2%
Speak a non-English language at home	12.5%

Household income

% of households	Value
<$10K	6.5%
$10–15K	2.6%
$15–25K	8.6%
$25–35K	6.2%
$35–50K	12.4%
$50–75K	20.2%
$75–100K	14.8%
$100–150K	13.5%
$150–200K	8.8%
$200K+	6.5%

Age

% of all residents	Value
<10	9.2%
10–19	11.0%
20–24	2.6%
25–34	8.1%
35–44	13.0%
45–54	10.9%
55–64	15.7%
65–74	15.8%
75+	13.6%

Tenure

% of housing units	Value
Owned, with mortgage	33.8%
Owned outright	35.6%
Rented	14.1%
Vacant	16.5%

Type of building

% of housing units	Value
Detached house	49.0%
Townhome	3.5%
2–4 units	3.1%
5–19 units	6.5%
20+ units	3.5%
Mobile / other	34.5%

Businesses in 33778

351 business establishments with 2,242 employees (ZIP Codes Business Patterns 2023).

Health Care and Social Assistance: 57
Retail Trade: 50
Professional, Scientific, and Technical Services: 41
Other Services (except Public Administration): 39
Construction: 36
Administrative and Support and Waste Management and Remediation Services: 33
Accommodation and Food Services: 29
Real Estate and Rental and Leasing: 23

EDDM carrier routes

33778 has 8 USPS carrier routes with 7,523 residential and 370 business mailboxes. Open the EDDM route map.

Carrier routes in 33778

33778 has 8 USPS carrier routes (8 city (C)) with 7,523 residential and 370 business mailboxes. Routes range from 729 homes (C067) to 1,354 homes (C078); the median route has 906 homes. The Census counted 6,836 households in 33778 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	0
500–749	2
750–999	3
1,000–1,499	3
1,500+	0

Best routes in 33778 for…

Most businesses

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

Route C017 — USPS business mailboxes 134, 740 homes
Route C006 — USPS business mailboxes 88, 878 homes
Route C049 — USPS business mailboxes 73, 759 homes
Route C024 — USPS business mailboxes 36, 1,069 homes
Route C078 — USPS business mailboxes 19, 1,354 homes

Select these 5 routes on the route map

Every carrier route in 33778

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C003	City	934	18	$63,753	—	—	—
C006	City	878	88	$56,450	—	—	—
C011	City	1,060	2	$78,920	—	—	—
C017	City	740	134	$30,773	—	—	—
C024	City	1,069	36	$140,154	—	—	—
C049	City	759	73	$97,634	—	—	—
C067	City	729	0	$140,154	—	—	—
C078	City	1,354	19	$63,753	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 33778 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

33774 — Largo city, FL (1.8 mi)
33770 — Largo city, FL (1.9 mi)
33771 — Largo city, FL (2.7 mi)
33773 — Pinellas Park city, FL (2.7 mi)
33772 — Seminole city, FL (3.1 mi)
33785 — Indian Rocks Beach city, FL (3.1 mi)
33776 — Seminole city, FL (3.2 mi)
33777 — Bardmoor CDP, FL (3.4 mi)

Areas that include 33778

Largo, FL ZIP codes — 8 ZIP codes
Seminole, FL ZIP codes — 5 ZIP codes
Ridgecrest, FL ZIP codes — 2 ZIP codes
Pinellas County ZIP codes — 48 ZIP codes
Florida ZIP code data

Where it ranks

Mail every home in 33778

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) 33778, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 33778 in?: 33778 is a Largo, FL mailing address. By land area, 31% lies inside Largo, 16% lies inside Ridgecrest and 15% lies inside Seminole; the rest is outside any Census-defined city or community.
What county is 33778 in?: 33778 is in Pinellas County.
What is the population of 33778?: About 16,807 people (±1,741), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 15,068.
What is the median household income in 33778?: $65,355 (±$4,816), 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 33778?: 8 USPS carrier routes with 7,523 residential and 370 business mailboxes (7,897 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 33778?: The closest, measured center to center: 33774 (1.8 mi, Largo), 33770 (1.9 mi, Largo), 33771 (2.7 mi, Largo), 33773 (2.7 mi, Pinellas Park), 33772 (3.1 mi, Seminole) and 33785 (3.1 mi, Indian Rocks Beach).

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