What city is 99324 in?

99324 is a College Place, WA mailing address. By land area, 87% lies inside College Place and 1% lies inside Garrett; the rest is outside any Census-defined city or community.

What county is 99324 in?

99324 is in Walla Walla County.

What is the population of 99324?

About 10,137 people (±224), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 10,226.

What is the median household income in 99324?

$62,839 (±$10,262), compared with $98,141 for Washington as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 99324?

7 USPS carrier routes with 4,348 residential and 137 business mailboxes (4,487 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 99324?

The closest, measured center to center: 99362 (5.2 mi, Walla Walla), 97862 (9 mi, Umapine), 99329 (13.2 mi, Dixie), 99360 (13.9 mi, Touchet), 97813 (14.8 mi, Athena) and 97886 (17.5 mi, Weston).

99324 ZIP Code, College Place, WA

99324 is a ZIP code in College Place, Washington in Walla Walla County. It covers 2.8 square miles of land. The closest ZIP codes are 99362, 97862 and 99329. 10,137 people live here in 3,552 households. At about 3,658 people per square mile it has suburban density, and owners and renters are mixed (65% own). Median household income is $62,839, well below the Washington median of $98,141.

Quick facts

Mailing city: College Place, WA
County: Walla Walla County
Land area: 2.8 sq mi
Population: 10,137
Median household income: $62,839
Carrier routes: 7 (4,348 homes)

Key figures

Measure	Value
Residents	10,137
Households	3,552
Median household income	$62,839
Income per person	$34,308
Median age	33.4
Homeowners	64.5%
Median home value	$368,500
Median rent	$1,188
Bachelor's degree or higher	36.5%
Average commute (minutes)	13.1
Households with kids under 18	28.4%
Moved in the past year	16.4%
Below the poverty line	10.6%
Broadband internet	94.7%
Speak a non-English language at home	16.4%

Household income

% of households	Value
<$10K	6.2%
$10–15K	1.8%
$15–25K	12.7%
$25–35K	7.4%
$35–50K	8.3%
$50–75K	19.2%
$75–100K	11.5%
$100–150K	15.0%
$150–200K	6.4%
$200K+	11.6%

Age

% of all residents	Value
<10	12.1%
10–19	16.7%
20–24	12.6%
25–34	9.9%
35–44	11.0%
45–54	7.3%
55–64	8.3%
65–74	13.2%
75+	8.8%

Tenure

% of housing units	Value
Owned, with mortgage	38.3%
Owned outright	22.3%
Rented	32.5%
Vacant	6.9%

Type of building

% of housing units	Value
Detached house	58.8%
Townhome	2.6%
2–4 units	16.6%
5–19 units	10.4%
20+ units	2.1%
Mobile / other	9.4%

Businesses in 99324

122 business establishments with 2,384 employees (ZIP Codes Business Patterns 2023).

Health Care and Social Assistance: 23
Retail Trade: 19
Construction: 13
Other Services (except Public Administration): 12
Accommodation and Food Services: 11
Real Estate and Rental and Leasing: 8
Administrative and Support and Waste Management and Remediation Services: 8
Professional, Scientific, and Technical Services: 7

EDDM carrier routes

99324 has 7 USPS carrier routes with 4,348 residential and 137 business mailboxes. Open the EDDM route map.

Carrier routes in 99324

99324 has 7 USPS carrier routes (6 city (C), 1 rural (R)) with 4,348 residential and 137 business mailboxes. Routes range from 297 homes (R009) to 946 homes (C001); the median route has 619 homes. The Census counted 3,552 households in 99324 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	1
500–749	5
750–999	1
1,000–1,499	0
1,500+	0

Best routes in 99324 for…

Most businesses

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

Route C008 — USPS business mailboxes 34, 600 homes
Route C002 — USPS business mailboxes 33, 714 homes
Route C001 — USPS business mailboxes 29, 946 homes
Route C003 — USPS business mailboxes 23, 639 homes
Route R009 — USPS business mailboxes 16, 297 homes

Select these 5 routes on the route map

Every carrier route in 99324

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	946	29	$98,638	—	—	—
C002	City	714	33	$87,956	—	—	—
C003	City	639	23	$83,810	—	—	—
C004	City	619	0	$98,638	—	—	—
C005	City	533	2	$87,956	—	—	—
C008	City	600	34	$83,810	—	—	—
R009	Rural	297	16	$83,810	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 99324 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

99362 — Walla Walla city, WA (5.2 mi)
97862 — Umapine CDP, OR (9 mi)
99329 — Dixie CDP, WA (13.2 mi)
99360 — Touchet CDP, WA (13.9 mi)
97813 — Athena city, OR (14.8 mi)
97886 — Weston city, OR (17.5 mi)
99361 — Waitsburg city, WA (17.7 mi)
97835 — Helix city, OR (21.1 mi)

Areas that include 99324

College Place, WA ZIP codes — 2 ZIP codes
Walla Walla County ZIP codes — 8 ZIP codes
Washington ZIP code data

Where it ranks

Mail every home in 99324

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) 99324, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 99324 in?: 99324 is a College Place, WA mailing address. By land area, 87% lies inside College Place and 1% lies inside Garrett; the rest is outside any Census-defined city or community.
What county is 99324 in?: 99324 is in Walla Walla County.
What is the population of 99324?: About 10,137 people (±224), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 10,226.
What is the median household income in 99324?: $62,839 (±$10,262), compared with $98,141 for Washington as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 99324?: 7 USPS carrier routes with 4,348 residential and 137 business mailboxes (4,487 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 99324?: The closest, measured center to center: 99362 (5.2 mi, Walla Walla), 97862 (9 mi, Umapine), 99329 (13.2 mi, Dixie), 99360 (13.9 mi, Touchet), 97813 (14.8 mi, Athena) and 97886 (17.5 mi, Weston).

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