| Population | 1,476 |
| Square Miles | 13.09 |
| Population Density | 112.76 |
| Median Age | 40 |
| Median Household Income | $47,500 |
| Per Capita Income | $21,413 |
| Median Rent | $466 |
| Percent Renters | 22% |
| Median Underwood, WA 98651 For Sale Price: | $378,000 |
| Studio For Sale Median Price: | $100,000 |
| 2 Bedroom For Sale Median Price: | $329,000 |
| 3 Bedroom For Sale Median Price: | $335,000 |
| 4 Bedroom For Sale Median Price: | $688,000 |