Monmouth, Oregon

Monmouth population, 2020 to 2024

Monmouth added 507 residents from July 2020 to July 2024, a change of +4.5%. In the latest year it moved by +76. Among 80 Oregon places of 5,000 or more, that growth ranks 16th; the median place changed by +0.8%. The median place of 5,000+ in Oregon has 14,915 people, so Monmouth is 78% of it.

Monmouth covers 2.24 square miles of land and 0.08 of water, for 5,201 people per square mile of land. The median Oregon place of 5,000+ has 3,097, so Monmouth is denser than the typical town.

What county Monmouth is in

All of Monmouth's residents live in Polk County, which had 90,549 residents in 2024. Monmouth holds 12.9% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Monmouth

1 ZIP Code Tabulation Area (ZCTA) overlaps Monmouth by at least 10% of the ZCTA's or the city's land: 97361. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Monmouth is

The Census internal point of Monmouth is at 44.851300, -123.228600. Salem, the capital, is 11.5 miles ENE in a straight line. The nearest larger place is Dallas, OR (17,911 people), 6.4 miles away. The nearest city of 100,000 or more is Salem, OR, 11.2 miles away.

Daylight in Monmouth

At 44.85° N, Monmouth gets about 15 h 36 min of daylight around the June solstice and 8 h 47 min around the December solstice, a swing of 6 h 49 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Monmouth

The eight nearest incorporated places of 1,000+ in Oregon, measured between internal points. The closest is Independence, 1.6 miles away, with 10,295 people.