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. Like its northern neighbor Algona, Pacific is sometimes mistaken for a part of Auburn.
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 (47.263272, -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.
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).