What is the population of Monmouth?

The population of Monmouth, OR is 10,615.

Where is Monmouth located?

Monmouth, OR is located at latitude 44.8484500 and longitude -123.2339900. It is in United States.

What is the area of Monmouth?

The area of Monmouth, OR is 5.802499 km².

What is the elevation of Monmouth?

Monmouth, OR has an elevation of 62 meters (203 feet) above sea level.

What time zone is Monmouth in?

Monmouth, OR is in the America/Los_Angeles time zone.

What state is Monmouth in?

Monmouth is in the state of Oregon, United States.

What county is Monmouth, OR in?

Monmouth is in Polk County, Oregon.

How has the population of Monmouth changed?

The population of Monmouth, OR has increased from 9,534 (2010) to 10,615 (2020), a change of 11.3%.

Monmouth, Oregon

Monmouth: city in Oregon, USA

About

Monmouth is a city located in the county of Polk in the U.S. state of Oregon. Its population at the 2010 census was 9,534 and a population density of 1,643 people per km². After 10 years in 2020 city had an estimated population of 10,615 inhabitants.

The city was created 167 years ago in 1858.

Monmouth locator map — Location of Monmouth on Oregon map.

Quick Facts about Monmouth

Population	10,615 (2020)
Country	United States of America
State	Oregon (United States)
County	Polk County
Postal code	97361
Phone Area Codes	503
Area	5.8 km²
Latitude & Longitude	44.8485,-123.2340
Named for	Monmouth
Altitude	214 feet / 65.2 meters
Establishment	January 01, 1859 (167 years ago)
Time Zone	America/Los_Angeles
Local time	14:54:50 (22nd April 2026)
Density	1,829 Pop. per km² as of 2020
Population growth	10.18% (2010-2020)
Weather	45℉ Light Rain Likely 7-days weather

Monmouth oregon main street image

Geography

Monmouth is located at 44°50'54"N 123°14'2"W (44.8484500, -123.2339900).

Monmouth map

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Weather

45°F

Light Rain Likely

6 mph W Tuesday Night

Rain likely. Mostly cloudy, with a low around 45. West wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an...

7-Day Forecast

Official website of Monmouth

Official Website

Demographics

The population of Monmouth increased by 10.18% in 10 years.

Year	Population	% Change	Method
2010	9,534	-	census
2011	9,727	1.98%	estimation process
2012	9,788	0.62%	estimation process
2013	9,812	0.24%	estimation process
2014	9,791	-0.21%	estimation process
2015	9,873	0.83%	estimation process
2016	10,144	2.67%	estimation process
2017	10,338	1.88%	estimation process
2018	10,469	1.25%	estimation process
2019	10,586	1.11%	estimation process
2020	10,615	0.27%	estimation process

Monmouth zip code is 97361. County name: Polk, County fips: 41053

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Where to Stay in Monmouth

1MaMere's Guest House - Historic B&B & Event Space

Rating: 4.9 (80)

212 Knox St N, Monmouth, OR 97361, United States View details

Phone: +15039178745 | Website available

MaMere's Guest House - Historic B&B & Event Space

Services and Civic Places in Monmouth

1Monmouth City Hall

Rating: 3 (1)

151 Main St W, Monmouth, OR 97361, United States View details

Phone: +15038380722 | Website available

2Monmouth Public Works

401 N Hogan Rd, Monmouth, OR 97361, United States View details

Phone: +15038382173 | Website available

3Monmouth Power & Light Department

780 Ecols St S, Monmouth, OR 97361, United States View details

Phone: +15038383526 | Website available

4City Recorders Office Monmouth

151 Main St W, Monmouth, OR 97361, United States View details

Phone: +15037510145

People born in Monmouth (2)

People born in Monmouth, including Recipient of the Purple Heart medal Herbert B. Powell, teacher and mystic Cecil A. Poole, .

More notable people

Nearby Schools and Colleges

Schools and campuses linked to Monmouth, OR. Select a name to open its map and contact details.

Code	Name	City	ZIP
210429	Western Oregon University	Monmouth (OR)	97361-1394

Nearby Transit Stations (15)

Rail and bus stations connected to Monmouth, OR. Select a station to open its map and address details.

Code	Name	Address	Type
SLM	Salem station	500 13th Street SE	RAIL
ALY	Albany station	110 10th Ave SW	RAIL
CVI	Corvallis, Oregon	153 NW 4th Avenue	BUS
WBN	Woodburn, OR	2900 Tom Tennant Drive	BUS
TDO	Toledo, Oregon	1805 NW Highway 20	BUS

Nearby Post Offices

Closest post offices linked to Monmouth.

Post Office Name	City	ZIP
Monmouth Post Office	Monmouth (OR)	97361

Other places with the same name (4)

Monmouth, Illinois city in Warren County, Illinois, United States with a population of 8,801 people.
Monmouth, Maine town in Kennebec County, Maine, United States with a population of 4,172 people.
Monmouth, Kansas unincorporated community in Kansas, United States with a population of 3,109 people.
Monmouth, Iowa city in Jackson County, Iowa, United States with a population of 154 people.

Other cities in Polk County

Cities, towns, neighborhoods & other populated places in Polk County , OR.

City Name	Population	Title
Dallas	17,331	City in Oregon, USA
Independence	10,871	City in Oregon, USA
Falls City	1,056	City in Oregon, USA

Distance to Other Cities

Monmouth distances to largest Oregon cities