Boundary Atlas

Cedar Mill, Oregon

Cedar Mill is a Census-designated place (an unincorporated community) in Washington County, Oregon, with 17,259 residents in 2020. It is in Oregon's 1st congressional district. It spans 2 state senate and 2 state house districts.

17,259residents (2020 Census)
3.3 sq miland area
1ZIP codes
1congressional district

County

CountyShare of residents
Washington County100%

Congressional district

Congressional districtShare of residents
Oregon's 1st congressional district (OR-01)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (OR-01)Suzanne Bonamici (D)202-225-0855100%
U.S. SenatorJeff Merkley (D)202-224-3753 · contact formstatewide
U.S. SenatorRon Wyden (D)202-224-5244 · contact formstatewide
State Senator (State Senate District 17)Lisa Reynolds (Democratic)86%
State Senator (State Senate District 14)Kate Lieber (Democratic)14%
State Representative (State House District 34)Mari Watanabe (Democratic)86%
State Representative (State House District 27)Ken Helm (Democratic)14%

Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

State legislative districts

State senate districtShare of residents
State Senate District 1786%
State Senate District 1414%

State house districtShare of residents
State House District 3486%
State House District 2714%

ZIP codes

Percentages mark ZIPs only partly in Cedar Mill: the share of that ZIP's residents living in it.

Get this in your AI agent

Your agent can get Cedar Mill's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:4112150")

Cedar Mill here is the Census Bureau's place boundary as of January 1, 2025 (a Census-designated place, which has no municipal government). Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.