Monmouth, OR Profile: Facts & Data


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Monmouth, Oregon - Basic Facts

The City of Monmouth had a population of 10,528 as of July 1, 2018. Monmouth ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Oregon. See peer rankings below.

The primary coordinate point for Monmouth is located at latitude 44.8505 and longitude -123.2284 in Polk County. The formal boundaries for the City of Monmouth (see map below) encompass a land area of 2.24 sq. miles and a water area of 0 sq. miles. Polk County is in the Pacific time zone (GMT -8). The elevation is 203 feet.

The City of Monmouth (GNIS ID: 2411134) 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 Monmouth is located within Monmouth-Independence Division of Polk County.

Jump to... (On This Page!)
  1. Monmouth 2018 Demographic Data
  2. Growth Rates for Monmouth (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 - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Monmouth, OR Data & Demographics (As of July 1, 2018)


Total Population 10,528
Population in Households 9,715
Population in Familes 6,354
Population in Group Qrtrs 813
Population Density2 4,699
Diversity Index3 53


Median Household Income $50,219
Average Household Income $66,244
Per Capita Income $25,774


Total Housing Units 3,821 (100%)
Owner Occupied HU 1,707 (44.7%)
Renter Occupied HU 1,891 (49.5%)
Vacant Housing Units 223 ( 5.8%)
Median Home Value $237,133
Average Home Value $268,131


Total Households 3,598
Average Household Size 2.7
Family Households 1,950
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  2. Population Density = Total Population per square mile.
  3. 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 race 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.


2010-2018 2018-2023
Population 1.21% 1.63%
Households 1.25% 1.65%
Families 1.19% 1.54%
Median Household Income   1.51%
Per Capita Income   1.97%

Monmouth, OR - Peer Comparisons by Rank and Percentile

The table below compares Monmouth to the other 378 incorporated cities, towns and CDPs in Oregon by rank and percentile using July 1, 2018 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 # 56 85th
Population Density # 28 93rd
Diversity Index # 68 82nd
Median Household Income # 193 49th
Per Capita Income # 207 46th

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

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Compare Oregon July 1, 2018 Data
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