Monmouth, OR Demographics

A map of Monmouth's Population by Race

Monmouth, Oregon has an estimated population of 11,428, a slight increase from the 11,110 recorded in the 2020 Census. The population is 70.2% White, 19.9% Hispanic, 5.3% Multiracial, 1.8% Asian, 1.6% Native American/Other, and 1.2% Black. This demographic dot map shows the population of Monmouth, with one dot drawn for each person counted by the Census, color-coded by race.

Monmouth has become less racially diverse since the 2020 Census. It is about as diverse as Oregon overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Monmouth, that probability was 48.0% in 2020 and 46.4% in the most recent ACS estimates.

Monmouth is ranked the 56th most populous place in Oregon, out of 426 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Monmouth was ranked the 56th most populous place in the 2020 Census.

Monmouth's White Population

8,021 residents of Monmouth, or 70.2% of the population, identify as White. The share of White residents in Monmouth is comparable to the share in Oregon overall, where 71.4% of the population is White. Monmouth ranks 355th statewide in terms of White residents as a share of the population, out of 426 places.

Since the 2020 Census, Monmouth's White population has grown by an estimated 4.2%. White residents' share of Monmouth's population has increased from 69.3% to 70.2%.

Monmouth is more White than neighboring Independence (53.1% White), Eola (0% White), and Adair Village (69.9% White). Monmouth is less White than neighboring Rickreall (100% White), and Dallas (78.4% White).

Monmouth's Black Population

133 residents of Monmouth, or 1.2% of the population, identify as Black. The share of Black residents in Monmouth is comparable to the share in Oregon overall, where 1.8% of the population is Black. Monmouth ranks 48th statewide in terms of Black residents as a share of the population, out of 426 places.

Since the 2020 Census, Monmouth's Black population has grown by an estimated 6.4%. Black residents' share of Monmouth's population has remained roughly unchanged at 1.2%.

Monmouth is more Black than neighboring Independence (0.6% Black), Rickreall (0% Black), and Eola (0% Black). Monmouth is less Black than neighboring Dallas (1.4% Black).

Monmouth's Asian Population

210 residents of Monmouth, or 1.8% of the population, identify as Asian. The share of Asian residents in Monmouth is slightly lower than in Oregon overall, where 4.4% of the population is Asian. Monmouth ranks 48th statewide in terms of Asian residents as a share of the population, out of 426 places.

Since the 2020 Census, Monmouth's Asian population has declined by an estimated 26.3%. Asian residents' share of Monmouth's population has decreased from 2.6% to 1.8%.

Monmouth is more Asian than neighboring Independence (1.1% Asian), Rickreall (0% Asian), Dallas (0.2% Asian), and Eola (0% Asian). Monmouth is less Asian than neighboring Adair Village (4.9% Asian).

Monmouth's Hispanic Population

2,274 residents of Monmouth, or 19.9% of the population, identify as Hispanic. The share of Hispanic residents in Monmouth is higher than in Oregon overall, where 14.7% of the population is Hispanic. Monmouth ranks 60th statewide in terms of Hispanic residents as a share of the population, out of 426 places.

Since the 2020 Census, Monmouth's Hispanic population has grown by an estimated 9.3%. Hispanic residents' share of Monmouth's population has increased from 18.7% to 19.9%.

Monmouth is more Hispanic than neighboring Rickreall (0% Hispanic), Dallas (11% Hispanic), Eola (0% Hispanic), and Adair Village (19% Hispanic). Monmouth is less Hispanic than neighboring Independence (38.5% Hispanic).

Monmouth's Native American/Other Population

179 residents of Monmouth, or 1.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Monmouth is comparable to the share in Oregon overall, where 1.6% of the population is Native American/Other. Monmouth ranks 130th statewide in terms of Native American/Other residents as a share of the population, out of 426 places.

Since the 2020 Census, Monmouth's Native American/Other population has declined by an estimated 22.2%. Native American/Other residents' share of Monmouth's population has decreased from 2.1% to 1.6%.

Monmouth is more Native American/Other than neighboring Independence (0.3% Native American/Other), Rickreall (0% Native American/Other), Eola (0% Native American/Other), and Adair Village (0% Native American/Other). Monmouth is less Native American/Other than neighboring Dallas (3.2% Native American/Other).

Monmouth's Multiracial Population

611 residents of Monmouth, or 5.3% of the population, identify as Multiracial. The share of Multiracial residents in Monmouth is comparable to the share in Oregon overall, where 6.1% of the population is Multiracial. Monmouth ranks 168th statewide in terms of Multiracial residents as a share of the population, out of 426 places.

Since the 2020 Census, Monmouth's Multiracial population has declined by an estimated 12.0%. Multiracial residents' share of Monmouth's population has decreased from 6.2% to 5.3%.

Monmouth is more Multiracial than neighboring Rickreall (0% Multiracial), Eola (0% Multiracial), and Adair Village (4.9% Multiracial). Monmouth is less Multiracial than neighboring Independence (6.5% Multiracial), and Dallas (5.8% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.