The Willamette watershed plan area features a diverse mix of land uses. It is the most intensely urbanized of the city's watersheds, encompassing the central city, large areas of commercial and industrial development (including the Port of Portland), and residential and mixed-use neighborhoods.
For the Willamette plan area overall, the largest general zoning category is currently single-family residential, about 33 percent of the total area. Single-family residential is also the largest category for the east side, about 45 percent. On the west side, the largest zoning category is public/open space, at about 38 percent. These percentages of zoning categories remain similar under planned future conditions. The largest increase is anticipated for the commercial zoning category on both sides of the plan area.
Portland's population, based on the most recent census data, is about 225,000 and is projected to grow about 6% to more than 235,000 in the next decade. The area of greatest population density is on the west side, north and south of West Burnside Street along the Interstate 405 freeway. This area has many multi-story apartment buildings. Most of the rest of the west side has a relatively low population density, since much of the area is part of the Central Business District or Forest Park, where housing is limited.
Overall, the east side has a much higher population and population density than the west side. Only the areas directly along the river in the east side have the lower population densities common to most of the west side.