The district contains all of Portland west of the Willamette River (Northwest, Southwest, and South sextants) as well as a small area on the east side including three neighborhoods.

The district contains the neighborhoods of Arlington Heights, Arnold Creek, Ashcreek, Bridlemile (including Glencullen), Collins View, Crestwood, Downtown, Eastmoreland, Far Southwest, Forest Park, Goose Hollow, Hayhurst (including Vermont Hills), Hillsdale, Hillside, Homestead, Linnton, Maplewood, Markham, Marshall Park, Multnomah (including Multnomah Village), Northwest District (including Uptown, Nob Hill, and the Alphabet Historic District), Northwest Heights, Northwest Industrial, Old Town Chinatown, Pearl District, Reed, Sellwood-Moreland, South Burlingame, South Portland (including Corbett, Fulton, Lair Hill, Terwilliger, and the Johns Landing and South Waterfront developments), Southwest Hills, Sylvan-Highlands, and West Portland Park (includes Capitol Hill).

District 4 is currently represented on Portland City Council by Olivia Clark, Mitch Green, and Eric Zimmerman.

Eli Arnold captured the third-most first preferences in the first round of tabulation, leading Eric Zimmerman by just over 100 votes.

However, Zimmerman received enough transfers (due voters' second- through sixth-place rankings on ballots that were tramsferred from eliminated candidates) to surpass Arnold's final vote total by just under 800 votes in further rounds of tabulation, and beat him out to the district's third seat.