North Plains, OR Profile: Facts & Data


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North Plains, Oregon - Basic Facts

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The City of North Plains had a population of 3,328 as of July 1, 2021. North Plains ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Oregon. See peer rankings below.

The primary coordinate point for North Plains is located at latitude 45.5971 and longitude -122.9934 in Washington County. The formal boundaries for the City of North Plains encompass a land area of 0.9 sq. miles and a water area of 0 sq. miles. Washington County is in the Pacific time zone (GMT -8). The elevation is 203 feet.

The City of North Plains has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Oregon is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The City of North Plains is located within North Plains Division of Washington County.

Jump to... (On This Page!)
  1. North Plains 2021 Demographic Data
  2. Growth Rates for North Plains (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Oregon Research Tools (Easy Tools & Current Data)
  3. Oregon Data Comparison Tool - 2021 Demographics

North Plains, OR Data & Demographics (As of July 1, 2021)


Total Population 3,328 (100%)
Population in Households 3,319 (99.7%)
Population in Families 2,780 (83.5%)
Population in Group Quarters1 9 ( 0.3%)
Population Density 3,023
Diversity Index2 41


Median Household Income $95,406
Average Household Income $113,199
% of Income for Mortgage4 19%
Per Capita Income $41,560
Wealth Index5 129


Total HU (Housing Units) 1,267 (100%)
Owner Occupied HU 1,016 (80.2%)
Renter Occupied HU 190 (15.0%)
Vacant Housing Units 61 ( 4.8%)
Median Home Value $419,624
Average Home Value $471,900
Housing Affordability Index3 137


Total Households 1,206
Average Household Size 2.75
Family Households 860
Average Family Size 3
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2021 2021-2026
Population 4.84% 3.32%
Households 4.85% 3.29%
Families 4.7% 3.23%
Median Household Income   2.99%
Per Capita Income   3.09%
Owner Occupied HU   3.42%

North Plains, OR - Peer Comparisons by Rank and Percentile

The table below compares North Plains to the other 378 incorporated cities, towns and CDPs in Oregon by rank and percentile using July 1, 2021 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 128 66th
Population Density # 75 80th
Median Household Income # 20 95th
Housing Affordability Index # 306 81st
Per Capita Income # 43 89th
Diversity Index # 121 68th

Additional comparisons and rankings can be made with a VERY EASY TO USE Oregon Census Data Comparison Tool.

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