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Pacific City Hall
Pacific City Hall
Location of Pacific, Washington within King County
Location of Pacific, Washington within King County
Country United States
State Washington
Counties King, Pierce
 • Type Mayor–council
 • Total 2.44 sq mi (6.31 km2)
 • Land 2.42 sq mi (6.27 km2)
 • Water 0.02 sq mi (0.05 km2)
79 ft (24 m)
 • Total 6,606
 • Estimate 
 • Density 2,966.12/sq mi (1,145.35/km2)
Time zone UTC-8 (Pacific (PST))
 • Summer (DST) UTC-7 (PDT)
ZIP code
Area code(s) 253
FIPS code 53-52495
GNIS feature ID 1512545

Pacific is a city in King and Pierce counties in the State of Washington. Located primarily in King County, the population was 6,606 at the 2010 census.


Platted August 10, 1906 by real estate promoter Clarence Dayton Hillman as "C.D. Hillman's Pacific City Addition to the City of Seattle," Pacific was officially incorporated on August 10, 1909.

Record-breaking rains in November 2006 pushed the White River over its river banks along Pacific City Park, creating a temporary 25-acre (100,000 m2) lake.

In January 2009, release of stormwaters from the Mud Mountain Dam caused even greater flooding, inundating more than a hundred homes.


Pacific is located at 47°15′48″N 122°14′52″W / 47.26333°N 122.24778°W / 47.26333; -122.24778 (47.263272, -122.247831).

According to the United States Census Bureau, the city has a total area of 2.43 square miles (6.29 km2), of which, 2.42 square miles (6.27 km2) is land and 0.01 square miles (0.03 km2) is water. The lower White River, also known as the Stuck River, runs through the east side of Pacific, between Auburn, Washington and Sumner, Washington.


Historical population
Census Pop.
1910 413
1920 320 −22.5%
1930 347 8.4%
1940 357 2.9%
1950 755 111.5%
1960 1,577 108.9%
1970 1,831 16.1%
1980 2,261 23.5%
1990 4,622 104.4%
2000 5,527 19.6%
2010 6,606 19.5%
2019 (est.) 7,178 8.7%
U.S. Decennial Census
2018 Estimate

2010 census

As of the census of 2010, there were 6,606 people, 2,269 households, and 1,605 families living in the city. The population density was 2,729.8 inhabitants per square mile (1,054.0/km2). There were 2,422 housing units at an average density of 1,000.8 per square mile (386.4/km2). The racial makeup of the city was 69.2% White, 3.1% African American, 1.9% Native American, 9.0% Asian, 1.8% Pacific Islander, 8.5% from other races, and 6.4% from two or more races. Hispanic or Latino of any race were 15.1% of the population.

There were 2,269 households, of which 43.0% had children under the age of 18 living with them, 46.5% were married couples living together, 15.0% had a female householder with no husband present, 9.2% had a male householder with no wife present, and 29.3% were non-families. 20.9% of all households were made up of individuals, and 5.5% had someone living alone who was 65 years of age or older. The average household size was 2.88 and the average family size was 3.32.

The median age in the city was 32.8 years. 28.1% of residents were under the age of 18; 10.1% were between the ages of 18 and 24; 28.7% were from 25 to 44; 25.7% were from 45 to 64; and 7.2% were 65 years of age or older. The gender makeup of the city was 50.0% male and 50.0% female.

2009 flooding

On January 8, 2009, the Army Corps of Engineers released water from Mud Mountain Dam into the White River. The action was done to relieve pressure in the reservoir, which had reached its capacity due to heavy rain that was causing flooding around the Puget Sound region. A large amount of water was released very quickly, causing rapid and massive flooding in Pacific. Those affected had virtually no notice of the impending disaster. One of those affected by the flooding was noted local and international musician Jerry Miller, a founding member of Moby Grape, who had recently moved to Pacific from Tacoma. Miller lost virtually all of his possessions, including over forty years of memorabilia from his music career. Assistance to those affected by the flooding was provided by the Federal Emergency Management Agency (FEMA).

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