Marietta-Alderwood, WA population, income and ZIP codes

Marietta-Alderwood CDP is a small town in Washington, with 3,569 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #233 of 639 ranked by population — larger than 63% of them. The median age here is 40.5 years against 39.1 nationally, a slightly older profile than the country as a whole. At this population the ACS sample is small, so the margin of error around every dollar figure below is wide — treat the numbers as a band, not a point, and expect them to move between annual releases without the place itself changing.

Households in Marietta-Alderwood CDP earn a median of $62,243 a year, 20.7% below the national figure of $78,538 and 31% below the $90,592 median for the 393 Washington cities we cover. The median is the midpoint household, not an average, so a handful of very high earners cannot drag it upward the way they distort a mean. Poverty reaches 12.6% of residents here, above the 12.4% national rate.

The typical owner-occupied home in Marietta-Alderwood CDP is valued at $493,200, 62.6% above the national figure and 5% above the $468,400 peer median, while median gross rent runs $1,450 a month, 3.1% above the national figure, or roughly $17,400 across a full year. A household on the local median income would put about 28% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is within the standard affordability guideline. The home-price-to-income ratio works out to 7.9×, against roughly 3.9× nationally, so buying is out of reach on local earnings alone and the ownership market leans on outside income, equity or dual high earners. 49.3% of occupied homes are owner-occupied versus 65% nationally, so the market leans more heavily on renters. Gross rent folds in the utilities a tenant pays separately, so it is closer to the real monthly outlay than a headline rent figure.

Home values sit at 7.9× median household income, far past the 3.9× national mark, so ownership costs here are set by something other than local wages — second homes, retirees with equity, or commuters earning elsewhere.

All values below were released by the Census for this exact geography, with no gap-filling on our side. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.