| City: | Littlerock, Washington |
| County: | Thurston County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 10:17:34 AM |
| Population: | 453 [See All] |
| Area Codes: | 360 / 564 |
| Classification: | PO Box |
| Coordinates: | 46.9019, -123.0168 |
| Land Area: | 0.119 sq mi |
| Quick Link: |
Mail delivery follows an institutional model built around named buildings. The post office maintains ZIP+4 records for one named facility (Postmaster) plus limited street addresses on 128th Avenue SW and Harencot. This isn't a town with scattered addresses. It's a controlled environment where mail routes to specific buildings within the institution. The 266 PO Boxes serve both facility operations and potentially staff, though actual resident counts show everyone lives on-site.
This ZIP exists within the boundaries of 98512, the larger Olympia-area ZIP code. Geographic data shows only a 0.12 square mile land area with minimal water features. The facility operates 3 business establishments employing 48 people based on 2003 business census data. Street delivery infrastructure includes one city carrier route serving the limited addressing needs, while 12 PO Box routes handle boxholder mail.
The community classification system identifies this as a small town hub with medium confidence, noting the single street route suggests service for a surrounding area. But the institutionalized population data tells the real story. Everyone counted here lives in group quarters, not private homes. The ZIP doesn't serve a traditional town. It serves one facility with controlled mail delivery to match its controlled population.
The minimal street infrastructure (just two street names) reflects a single-facility environment rather than a developed community. Both streets provide access points to the institution rather than serving a residential neighborhood.
ZIP Code 98556 has 453 residents and 0 households. The median age is 36.8 years, slightly younger than the state (38.1) and slightly younger than the nation (38.8). The gender split is 98.0% male and 2.0% female, which is much higher than the national male share (49.1%), making this a male-majority area. Largest groups are White (64.0%, slightly lower than the state average of 66.6%) and Black or African American (24.3%, much higher than the state average of 4.0% and well above the national average of 12.4%); Hispanic or Latino residents make up 7.7%, which is much lower than the national average (18.7%), and Black or African American share is much higher than both the state (4.0%) and national averages (12.4%).
Explore More:Population Over TimeBy Age & GenderBy RaceBy GenderNativity & Citizenship
| 2020 Population: | 453Source: Census DHC |
| 2024 ACS Population Estimate: | 350Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 3,806.7 people per sq mile |
| Average Income: | $0Source: Census ACS |
| Households: | 0Source: Census DHC |
| Average House Value: | $666,666,666Source: Census ACS |
| Persons Per Household: | 0.00Source: Census DHC |
| Average Family Size: | 0.00Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 592 | 448 | 402 | 350 |
| Decennial Census | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 453 | -- | -- | -- | -- |
Median Age: 36.8
Male Median Age: 37
Female Median Age: 34.5
| Group | < 5 | 5-9 | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 | 35-39 | 40-44 | 45-49 | 50-54 | 55-59 | 60-64 | 65-69 | 70-74 | 75-79 | 80-84 | 85+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | 0 | 0 | 0 | 2 | 29 | 62 | 87 | 96 | 65 | 30 | 36 | 20 | 9 | 2 | 1 | 5 | 0 | 0 |
| Female | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 3 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 0 | 0 | 0 | 2 | 29 | 64 | 90 | 99 | 65 | 30 | 36 | 21 | 9 | 2 | 1 | 5 | 0 | 0 |
| White: | 290 | 63.60% |
| Black: | 110 | 24.12% |
| Hispanic:* | 35 | 7.68% |
| Asian: | 2 | 0.44% |
| American Indian: | 15 | 3.29% |
| Hawaiian: | 0 | 0% |
| Other: | 4 | 0.88% |
| Total: | 456 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 444 | 98.01% | 37.0 years |
| Females: | 9 | 1.99% | 34.5 years |
| Total: | 453 | 100% | 36.8 years |
| Native, born in the United States: | 346 | 98.86% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0.00% |
| Foreign born, naturalized U.S. citizen: | 4 | 1.14% |
| Foreign born, not a U.S. citizen: | 0 | 1.14% |
| Total Population: | 350 | 100% |
| Total Native Population: | 346 | 98.86% |
| Total Foreign-born Population: | 4 | 1.14% |
In 2024, the Median household income is $0, which is well under the national median ($80,734), and above its 2019 pre-pandemic level by $0. Family households earn a median of $0 versus $0 for nonfamily households (a difference of $0). By gender, male median income is $0 and female is $0, which is considerably lower than the national female median ($55,274), with a current gap of $0 that has stayed about the same from 2011 to 2024. The labor-force participation rate is 0.0%, which is markedly below the national rate (63.5%).
Explore More:Income Over TimeHousehold IncomeEmployment StatusBy Occupation
| Income Type | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Household Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median Family Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median NonFamily Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median Male Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $14,948 | $14,514 | $0 | $0 |
| Median Female Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Employed: | 0 | 0.00% |
| Unemployed: | 0 | 0.00% |
| Not In Labor Force: | 350 | 100.00% |
| Total: | 350 | 100% |
| Management, business, science, and arts: | 0 | 0% |
| Service: | 0 | 0% |
| Sales and Office: | 0 | 0% |
| Natural resources, construction, and maintenance: | 0 | 0% |
| Production, transportation, and material moving: | 0 | 0% |
| Total Civilian Employed Population: | 0 | 100% |
In 2024, 0.00% of adults (25+) have a bachelor's degree or higher, which is far lower than the national rate (35.70%). High school or higher is 96.50%, which is far higher than the national rate (89.60%). The uninsured rate is -666,666,666.00%, which is far lower than the national rate (8.40%). Private coverage is -666,666,666.00%, which is far lower than the national rate (67.10%). Public coverage is -666,666,666.00%, which is far lower than the national rate (36.70%). The share of people in poverty is -666,666,666.00%, which is far lower than the national rate (8.80%). Poverty has been broadly stable, which may reflect structural barriers or offsetting gains and setbacks. Among residents ages 3+, the largest enrollment group is college (100.00%). College enrollment is 100.00%, which is comparable to the national rate (26.70%), meaning the community mirrors broader higher-education participation.
Explore More:Educational AttainmentHealth InsurancePoverty Over TimeSchool Enrollment
| Less than 9th grade: | 0 | 0.00% |
| 9th to 12th grade, no diploma: | 12 | 3.47% |
| High school graduate (includes equivalency): | 248 | 71.68% |
| Some college, no degree: | 86 | 24.86% |
| Associate's degree: | 0 | 0.00% |
| Bachelor's degree: | 0 | 0.00% |
| Graduate or professional degree: | 0 | 0.00% |
| Total: | 346 | 100% |
| High school or higher: | 334 | 96.53% |
| Bachelor's degree or higher: | 0 | 0.00% |
| Private Insurance: | 0 | 0% |
| Public Insurance: | 0 | 0% |
| No Insurance: | 0 | 0% |
| Total: | 0 | 100% |
| Has Health Insurance: | 0 | 0% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % of People in Poverty | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
Note: Counts of Families & People in poverty are not published at the ZIP Code level due to small sample sizes. Percentages shown are survey estimates from the American Community Survey (ACS). They may differ from official poverty statistics. The U.S. Census Bureau defines poverty status by comparing a family's or individual's total income with federal poverty thresholds that vary by family size and composition.
| Nursery School, Preschool: | 0 | 0.00% |
| Kindergarten: | 0 | 0.00% |
| Elementary school (grades 1-8): | 0 | 0.00% |
| High school (grades 9-12): | 0 | 0.00% |
| College or graduate school: | 11 | 100.00% |
| Total: | 11 | 100% |
| Early Childhood: | 0 | 0.00% |
| K-12 (Primary & Secondary School): | 0 | 0.00% |
ZIP Code 98556 supports both business and residential activity. According to the Business Census (2024), there are 3 business establishments, employing about 48 people with an annual payroll of $2,292,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 510Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 3Source: CBP |
| 1st Quarter Payroll: | $557,000Source: CBP |
| Annual Payroll: | $2,292,000Source: CBP |
| # of Employees: | 48Source: CBP |
ZIP Code 98556 is located in Thurston County, Washington, within the Olympia-Lacey-Tumwater, WA Metropolitan Statistical Area (CBSA 36500) and Washington's 10th Congressional District. This Metro area has a population of 252,264 people, about 0.18% of whom live in ZIP Code 98556. It covers 0.119 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Olympia-Lacey-Tumwater, WASource: Census |
| CBSA Number: | 36500Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 252,264Source: Census |
| MSA: | Seattle-Tacoma-Bremerton, WA CMSASource: Census |
| Land Area: | 0.119 sq miSource: Census |
| Water Area: | --Source: Census |
| Congressional District: | 10Source: USPS |
| Congressional Land Area: | 826.67 sq miSource: Census |
| PMSA: | Olympia, WA PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
We could not locate which school district 98556 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.