What city is 98579 in?

98579 is a Rochester, WA mailing address. By land area, 9% lies inside Rochester and 3% lies inside Grand Mound; the rest is outside any Census-defined city or community.

What is the population of 98579?

About 14,048 people (±1,449), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 13,648.

What is the median household income in 98579?

$99,411 (±$17,329), 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 98579?

9 USPS carrier routes with 4,857 residential and 114 business mailboxes (4,972 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 98579?

The closest, measured center to center: 98544 (5.8 mi), 98556 (6.8 mi), 98568 (9.8 mi, Oakville), 98531 (11.1 mi, Centralia), 98532 (11.7 mi, Chehalis) and 98530 (11.9 mi, Bucoda).

98579 ZIP Code, Rochester, WA

Q: What county is 98579 in?

98579 is mostly in Thurston County (59% of its land), with smaller parts in Lewis County.

98579 is a ZIP code in Rochester, Washington — mostly in Thurston County (59% of its land), with smaller parts in Lewis County. It covers 94 square miles of land. The closest ZIP codes are 98544, 98556 and 98568. 14,048 people live here in 5,023 households. With about 149 people per square mile it is lightly settled, and most homes are owner-occupied (80%). Median household income is $99,411, close to the Washington median of $98,141.

Quick facts

Mailing city: Rochester, WA
County: Thurston County
Land area: 94 sq mi
Population: 14,048
Median household income: $99,411
Carrier routes: 9 (4,857 homes)

Key figures

Measure	Value
Residents	14,048
Households	5,023
Median household income	$99,411
Income per person	$38,147
Median age	41.6
Homeowners	80.2%
Median home value	$463,400
Median rent	$1,532
Bachelor's degree or higher	20.6%
Average commute (minutes)	29.4
Households with kids under 18	28.2%
Moved in the past year	8.4%
Below the poverty line	11.8%
Broadband internet	97.0%
Speak a non-English language at home	6.7%

Household income

% of households	Value
<$10K	1.1%
$10–15K	0.8%
$15–25K	7.1%
$25–35K	6.3%
$35–50K	11.4%
$50–75K	12.8%
$75–100K	11.3%
$100–150K	25.1%
$150–200K	15.0%
$200K+	9.0%

Age

% of all residents	Value
<10	11.7%
10–19	10.4%
20–24	6.2%
25–34	13.1%
35–44	11.8%
45–54	15.6%
55–64	14.0%
65–74	10.6%
75+	6.6%

Tenure

% of housing units	Value
Owned, with mortgage	51.0%
Owned outright	26.3%
Rented	18.7%
Vacant	4.0%

Type of building

% of housing units	Value
Detached house	68.5%
Townhome	1.5%
2–4 units	0.8%
5–19 units	1.3%
20+ units	2.4%
Mobile / other	25.5%

Businesses in 98579

235 business establishments with 1,956 employees (ZIP Codes Business Patterns 2023).

Construction: 62
Retail Trade: 31
Accommodation and Food Services: 19
Real Estate and Rental and Leasing: 18
Administrative and Support and Waste Management and Remediation Services: 16
Health Care and Social Assistance: 15
Other Services (except Public Administration): 15
Transportation and Warehousing: 12

EDDM carrier routes

98579 has 9 USPS carrier routes with 4,857 residential and 114 business mailboxes. Open the EDDM route map.

Carrier routes in 98579

98579 has 9 USPS carrier routes (9 rural (R)) with 4,857 residential and 114 business mailboxes. Routes range from 351 homes (R152) to 646 homes (R154); the median route has 543 homes. The Census counted 5,023 households in 98579 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	1
500–749	8
750–999	0
1,000–1,499	0
1,500+	0

Best routes in 98579 for…

Most businesses

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

Route R157 — USPS business mailboxes 34, 543 homes
Route R158 — USPS business mailboxes 23, 569 homes
Route R159 — USPS business mailboxes 17, 590 homes
Route R155 — USPS business mailboxes 17, 538 homes
Route R153 — USPS business mailboxes 10, 593 homes

Select these 5 routes on the route map

Every carrier route in 98579

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R151	Rural	510	2	$113,329	—	—	—
R152	Rural	351	2	$54,458	—	—	—
R153	Rural	593	10	$110,637	—	—	—
R154	Rural	646	7	$101,372	—	—	—
R155	Rural	538	17	$87,596	—	—	—
R156	Rural	517	2	$83,872	—	—	—
R157	Rural	543	34	$83,872	—	—	—
R158	Rural	569	23	$83,872	—	—	—
R159	Rural	590	17	$83,872	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 98579 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

98544 (5.8 mi)
98556 (6.8 mi)
98568 — Oakville city, WA (9.8 mi)
98531 — Centralia city, WA (11.1 mi)
98532 — Chehalis city, WA (11.7 mi)
98530 — Bucoda town, WA (11.9 mi)
98512 — Tumwater city, WA (12 mi)
98539 (12.5 mi)

Areas that include 98579

Rochester, WA ZIP codes — 1 ZIP code
Grand Mound, WA ZIP codes — 2 ZIP codes
Lewis County ZIP codes — 22 ZIP codes
Thurston County ZIP codes — 15 ZIP codes
Washington ZIP code data

Where it ranks

Mail every home in 98579

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) 98579, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 98579 in?: 98579 is a Rochester, WA mailing address. By land area, 9% lies inside Rochester and 3% lies inside Grand Mound; the rest is outside any Census-defined city or community.
What county is 98579 in?: 98579 is mostly in Thurston County (59% of its land), with smaller parts in Lewis County.
What is the population of 98579?: About 14,048 people (±1,449), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 13,648.
What is the median household income in 98579?: $99,411 (±$17,329), 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 98579?: 9 USPS carrier routes with 4,857 residential and 114 business mailboxes (4,972 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 98579?: The closest, measured center to center: 98544 (5.8 mi), 98556 (6.8 mi), 98568 (9.8 mi, Oakville), 98531 (11.1 mi, Centralia), 98532 (11.7 mi, Chehalis) and 98530 (11.9 mi, Bucoda).

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