What city is 48320 in?

48320 is a Keego Harbor, MI mailing address. By land area, 45% lies inside Keego Harbor, 42% lies inside Sylvan Lake and 8% lies inside Orchard Lake Village; the rest is outside any Census-defined city or community.

What is the population of 48320?

About 4,277 people (±192), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 4,328.

What is the median household income in 48320?

$78,150 (±$12,335), compared with $72,875 for Michigan as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 48320?

4 USPS carrier routes with 2,051 residential and 270 business mailboxes (2,321 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 48320?

The closest, measured center to center: 48341 (2.6 mi, Pontiac), 48302 (2.7 mi, Pontiac), 48328 (2.9 mi), 48324 (3.1 mi, Orchard Lake Village), 48323 (3.5 mi, Orchard Lake Village) and 48342 (3.9 mi, Pontiac).

48320 ZIP Code, Keego Harbor, MI

48320 is a ZIP code in Keego Harbor, Michigan in Oakland County. It covers 1.1 square miles of land. The closest ZIP codes are 48341, 48302 and 48328. 4,277 people live here in 2,161 households. At about 3,906 people per square mile it has suburban density, and owners and renters are mixed (70% own). Median household income is $78,150, close to the Michigan median of $72,875.

Quick facts

Mailing city: Keego Harbor, MI
County: Oakland County
Land area: 1.1 sq mi
Population: 4,277
Median household income: $78,150
Carrier routes: 4 (2,051 homes)

Key figures

Measure	Value
Residents	4,277
Households	2,161
Median household income	$78,150
Income per person	$59,318
Median age	43.2
Homeowners	69.9%
Median home value	$345,900
Median rent	$1,214
Bachelor's degree or higher	47.1%
Average commute (minutes)	26.2
Households with kids under 18	21.6%
Moved in the past year	5.3%
Below the poverty line	12.1%
Broadband internet	87.9%
Speak a non-English language at home	11.9%

Household income

% of households	Value
<$10K	8.2%
$10–15K	2.5%
$15–25K	2.4%
$25–35K	11.9%
$35–50K	6.3%
$50–75K	16.6%
$75–100K	14.7%
$100–150K	14.6%
$150–200K	6.1%
$200K+	16.7%

Age

% of all residents	Value
<10	11.1%
10–19	11.1%
20–24	6.0%
25–34	11.2%
35–44	12.9%
45–54	8.1%
55–64	18.3%
65–74	11.5%
75+	9.8%

Tenure

% of housing units	Value
Owned, with mortgage	46.4%
Owned outright	19.1%
Rented	27.0%
Vacant	7.5%

Type of building

% of housing units	Value
Detached house	72.4%
Townhome	2.7%
2–4 units	3.9%
5–19 units	10.3%
20+ units	10.1%
Mobile / other	0.5%

Businesses in 48320

217 business establishments with 2,007 employees (ZIP Codes Business Patterns 2023).

Accommodation and Food Services: 35
Professional, Scientific, and Technical Services: 32
Retail Trade: 31
Construction: 22
Administrative and Support and Waste Management and Remediation Services: 18
Other Services (except Public Administration): 17
Health Care and Social Assistance: 15
Finance and Insurance: 12

EDDM carrier routes

48320 has 4 USPS carrier routes with 2,051 residential and 270 business mailboxes. Open the EDDM route map.

Carrier routes in 48320

48320 has 4 USPS carrier routes (4 city (C)) with 2,051 residential and 270 business mailboxes. Routes range from 449 homes (C029) to 585 homes (C031); the median route has 509 homes. The Census counted 2,161 households in 48320 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

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

Best routes in 48320 for…

Most businesses

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

Route C031 — USPS business mailboxes 102, 585 homes
Route C028 — USPS business mailboxes 101, 485 homes
Route C029 — USPS business mailboxes 47, 449 homes
Route C032 — USPS business mailboxes 20, 532 homes

Select these 4 routes on the route map

Every carrier route in 48320

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C028	City	485	101	$58,081	—	—	—
C029	City	449	47	$94,024	—	—	—
C031	City	585	102	$78,777	—	—	—
C032	City	532	20	$64,142	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 48320 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

48341 — Pontiac city, MI (2.6 mi)
48302 — Pontiac city, MI (2.7 mi)
48328 (2.9 mi)
48324 — Orchard Lake Village city, MI (3.1 mi)
48323 — Orchard Lake Village city, MI (3.5 mi)
48342 — Pontiac city, MI (3.9 mi)
48327 (4.1 mi)
48340 — Pontiac city, MI (4.9 mi)

Areas that include 48320

Mail every home in 48320

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) 48320, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 48320 in?: 48320 is a Keego Harbor, MI mailing address. By land area, 45% lies inside Keego Harbor, 42% lies inside Sylvan Lake and 8% lies inside Orchard Lake Village; the rest is outside any Census-defined city or community.
What county is 48320 in?: 48320 is in Oakland County.
What is the population of 48320?: About 4,277 people (±192), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 4,328.
What is the median household income in 48320?: $78,150 (±$12,335), compared with $72,875 for Michigan as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 48320?: 4 USPS carrier routes with 2,051 residential and 270 business mailboxes (2,321 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 48320?: The closest, measured center to center: 48341 (2.6 mi, Pontiac), 48302 (2.7 mi, Pontiac), 48328 (2.9 mi), 48324 (3.1 mi, Orchard Lake Village), 48323 (3.5 mi, Orchard Lake Village) and 48342 (3.9 mi, Pontiac).

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