Markham, Washington Demographics & Population 2026
During the 2020–2024 ACS period, Markham, Washington had a total population of 166, the 569th largest community in Washington, with a median household income of $90,956, which is 7% lower than the state average. The poverty rate is 0.0%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Only 4.8% of adults have a bachelor's degree, well below the national average of 35.7%.
Markham Quick Facts
How Markham Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 173 | 166 | -4.0% |
| Median household income | $88,487 | $90,956 | +2.8% |
How Markham Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 56 | National average: 61
Education
Educational Attainment (Adults 25+)
Markham Rankings in Washington
Explore Washington Rankings
Other Cities in Grays Harbor County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Aberdeen | 17,088 | $52,195 | 23.8% | $237,300 |
| Hoquiam | 8,800 | $49,795 | 17.2% | $228,200 |
| Ocean Shores | 7,302 | $58,202 | 12.3% | $383,500 |
| Montesano | 4,183 | $67,540 | 4.9% | $354,300 |
| Elma | 3,483 | $78,086 | 24.9% | $409,600 |
| Central Park | 3,206 | $99,127 | 6.4% | $335,500 |
| Westport | 2,217 | $64,750 | 7.3% | $196,600 |
| Cosmopolis | 2,202 | $84,853 | 10.3% | $317,000 |
| McCleary | 2,094 | $77,813 | 10.4% | $351,700 |
| Oakville | 878 | $63,893 | 19.4% | $230,800 |
Cities Similar to Markham
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Lamont | 170 | N/A | $102,100 | 9.5% | 55.3% |
| Willapa | 172 | N/A | $263,600 | 0.0% | 0.0% |
| Index | 173 | N/A | $580,400 | 14.4% | 13.3% |
| Porter | 155 | N/A | $398,500 | 40.0% | 13.6% |
| Cougar | 151 | N/A | N/A | 0.0% | 0.0% |
A note before these figures: with a population of 166, Markham's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Markham is a small community located in Washington, within Grays Harbor County. The total population is 166. It ranks as the 569th most populous out of 628 Census-designated places in Washington.
Age Demographics
The median age in Markham is 72.2 years. This is 89% higher than the state median of 38.3 years. 22.3% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Markham is $90,956. This is 7% lower than the state median of $98,141. It is also 13% higher than the national median of $80,734. The ACS records no residents below the poverty line in Markham. In a community this small the estimate rests on very few survey responses, so it should be read as an absence of measurement rather than a measured absence of poverty. The survey records no unemployed residents in Markham, which reflects the size of the sample rather than a labor market without joblessness. 100.0% of occupied housing units are owner-occupied. This homeownership rate is 57% higher than the state average of 63.8%.
Race & Ethnicity
The largest racial or ethnic group in Markham is White (non-Hispanic), making up 74.7% of the population.
Education
4.8% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. This is 88% lower than the state rate of 39.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 97.0%.
Data Sources & Methodology
All demographic data for Markham, Washington is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Washington state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 628 Census-designated places in Washington. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Markham, Washington?
Markham, Washington has a population of 166 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Markham, WA?
The median household income in Markham is $90,956, which is 13% higher than the national median of $80,734.
What is the poverty rate in Markham, WA?
The ACS sample for Markham recorded no residents below the federal poverty line. Because the community is small, this indicates that the survey did not capture poverty here rather than that no poverty exists — the estimate carries a wide margin of error.
What is the racial makeup of Markham, Washington?
Markham's population is 74.7% White, 0.0% Black, 0.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Markham, WA?
The Census Bureau does not publish a reliable median home value estimate for Markham — there are too few owner-occupied homes in the ACS sample. The national median is $332,700.
How educated is Markham, Washington?
4.8% of adults (25+) in Markham hold a bachelor's degree or higher, and 2.4% hold a graduate or professional degree.