What city is 99320 in?

99320 is a Benton City, WA mailing address. By land area, 3% lies inside West Richland and 1% lies inside Benton City; the rest is outside any Census-defined city or community.

What is the population of 99320?

About 9,879 people (±812), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 10,215.

What is the median household income in 99320?

$90,102 (±$16,347), 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 99320?

7 USPS carrier routes with 3,976 residential and 89 business mailboxes (4,065 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 99320?

The closest, measured center to center: 99353 (5.7 mi, West Richland), 99354 (9.9 mi, Richland), 99352 (11.6 mi, Richland), 98944 (14.9 mi, Sunnyside), 99338 (15.2 mi, Kennewick) and 99350 (16.7 mi, Prosser).

99320 ZIP Code, Benton City, WA

99320 is a ZIP code in Benton City, Washington in Benton County. It covers 209 square miles of land. The closest ZIP codes are 99353, 99354 and 99352. 9,879 people live here in 3,495 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (85%). Median household income is $90,102, close to the Washington median of $98,141.

Quick facts

Mailing city: Benton City, WA
County: Benton County
Land area: 209 sq mi
Population: 9,879
Median household income: $90,102
Carrier routes: 7 (3,976 homes)

Key figures

Measure	Value
Residents	9,879
Households	3,495
Median household income	$90,102
Income per person	$39,599
Median age	36.4
Homeowners	85.3%
Median home value	$373,500
Median rent	$881
Bachelor's degree or higher	18.0%
Average commute (minutes)	31.1
Households with kids under 18	31.8%
Moved in the past year	9.0%
Below the poverty line	10.2%
Broadband internet	90.6%
Speak a non-English language at home	13.9%

Household income

% of households	Value
<$10K	5.4%
$10–15K	1.7%
$15–25K	8.6%
$25–35K	9.1%
$35–50K	7.9%
$50–75K	12.4%
$75–100K	9.0%
$100–150K	24.1%
$150–200K	11.7%
$200K+	10.1%

Age

% of all residents	Value
<10	16.0%
10–19	11.3%
20–24	6.1%
25–34	15.2%
35–44	9.8%
45–54	15.3%
55–64	12.3%
65–74	8.7%
75+	5.3%

Tenure

% of housing units	Value
Owned, with mortgage	52.6%
Owned outright	26.1%
Rented	13.4%
Vacant	7.8%

Type of building

% of housing units	Value
Detached house	56.8%
Townhome	3.6%
2–4 units	2.9%
5–19 units	0.0%
20+ units	0.7%
Mobile / other	36.1%

Businesses in 99320

144 business establishments with 877 employees (ZIP Codes Business Patterns 2023).

Construction: 51
Manufacturing: 17
Other Services (except Public Administration): 12
Retail Trade: 11
Professional, Scientific, and Technical Services: 10
Real Estate and Rental and Leasing: 8
Administrative and Support and Waste Management and Remediation Services: 8
Wholesale Trade: 6

EDDM carrier routes

99320 has 7 USPS carrier routes with 3,976 residential and 89 business mailboxes. Open the EDDM route map.

Carrier routes in 99320

99320 has 7 USPS carrier routes (7 rural (R)) with 3,976 residential and 89 business mailboxes. Routes range from 257 homes (R007) to 775 homes (R004); the median route has 548 homes. The Census counted 3,495 households in 99320 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

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

Best routes in 99320 for…

Most businesses

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

Route R004 — USPS business mailboxes 37, 775 homes
Route R003 — USPS business mailboxes 17, 548 homes
Route R008 — USPS business mailboxes 13, 688 homes
Route R006 — USPS business mailboxes 12, 766 homes
Route R001 — USPS business mailboxes 5, 465 homes

Select these 5 routes on the route map

Every carrier route in 99320

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R001	Rural	465	5	$72,474	—	—	—
R002	Rural	477	3	$76,535	—	—	—
R003	Rural	548	17	$102,666	—	—	—
R004	Rural	775	37	$76,535	—	—	—
R006	Rural	766	12	$60,989	—	—	—
R007	Rural	257	2	$76,535	—	—	—
R008	Rural	688	13	$33,436	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 99320 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

99353 — West Richland city, WA (5.7 mi)
99354 — Richland city, WA (9.9 mi)
99352 — Richland city, WA (11.6 mi)
98944 — Sunnyside city, WA (14.9 mi)
99338 — Kennewick city, WA (15.2 mi)
99350 — Prosser city, WA (16.7 mi)
99336 — Kennewick city, WA (17.5 mi)
98930 — Grandview city, WA (18.8 mi)

Areas that include 99320

West Richland, WA ZIP codes — 2 ZIP codes
Benton City, WA ZIP codes — 1 ZIP code
Benton County ZIP codes — 12 ZIP codes
Washington ZIP code data

Where it ranks

Mail every home in 99320

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) 99320, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 99320 in?: 99320 is a Benton City, WA mailing address. By land area, 3% lies inside West Richland and 1% lies inside Benton City; the rest is outside any Census-defined city or community.
What county is 99320 in?: 99320 is in Benton County.
What is the population of 99320?: About 9,879 people (±812), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 10,215.
What is the median household income in 99320?: $90,102 (±$16,347), 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 99320?: 7 USPS carrier routes with 3,976 residential and 89 business mailboxes (4,065 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 99320?: The closest, measured center to center: 99353 (5.7 mi, West Richland), 99354 (9.9 mi, Richland), 99352 (11.6 mi, Richland), 98944 (14.9 mi, Sunnyside), 99338 (15.2 mi, Kennewick) and 99350 (16.7 mi, Prosser).

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