The United States acquired the area of Oregon by a treaty with Great Britain in 1846. Oregon Territory was organized from the acquired area on August 14, 1848, and included all of present-day Oregon, Idaho, and Washington and part of western Montana and Wyoming. The territory was reduced in 1853 when Washington Territory was organized. In 1859, additional territory was transferred to Washington Territory, leaving Oregon with generally the same boundary as the present state.
Census data for Oregon are available beginning with the 1850 census. The 1850 population is for the area in present-day Oregon; it does not include the entire territory as legally established. The population of Oregon Territory as legally constituted in 1850 was 13,294.
Data for the legally established state of Oregon are available beginning with the 1860 census.
See: Geographic Terms & Concepts
Counties & County Equivalents
Interactive Map of Oregon Counties | Static Overview Map of Oregon Counties
Oregon has 36 counties. All counties are functioning governmental units, each governed by a board of county commissioners.
There are 212 county subdivisions in Oregon. They are all census county divisions (CCDs), which are delineated for statistical purposes, have no legal function, and are not governmental units.
Places (Incorporated Cities, Towns & Census Designated Places (CDPs))
Oregon has 377 places; 242 incorporated places and 135 census designated places (CDPs). The incorporated places consist of 233 cities and 9 towns. There is one inactive city, Greenhorn. The minimum population for incorporation is 150.
Alphabetical List of Cities, Towns, CDPs and Other Populated Places
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q, R | S | T | U, V | W, X, Y, Z
Oregon Civil Features
Oregon Civil Features: Political Subdivisions, Native Areas, Land Grants, etc. - sorted by Census Class Codes.
Metropolitan and Micropolitan Statistical Areas
There are 8 Metropolitan and 12 Micropolitan Statistical Areas in Oregon. OR Metopolitan & Micropolitan Areas
Oregon ZIP Code Tabulation Areas
There are 419 ZIP Code tabulation areas (ZCTAs) in Oregon. View Oregon ZIP Codes and ZIP Code Maps.
Oregon has 9 elementary school districts, 1 secondary school district, and 188 unified school districts. View Oregon Public and Private Schools.
Oregon has 5 congressional districts. An interactive map shows the contact information for each Representative as well as the boundaries for each Oregon district. View Map of Oregon Congressional Districts.
State Legislative Districts
There are 30 state senate districts and 60 state house districts in Oregon.
American Indian Areas
Oregon has 11 American Indian area reservations, 6 with off-reservation trust land.