First of all, it is important to know that the Earth's crust is broken up into large pieces called tectonic plates. Remember, tectonic plates are giant pieces of the Earth's crust that fit together and move around on the Earth's surface.
In 2014, Walla Walla Countyâs population was 59,844, showing 1.8 percent growth from 2010 to 2014, compared to the stateâs growth rate of 5.0 percent. The largest city in Walla Walla County is city of Walla Walla with a population of 32,260 in 2014.
Columbia County, Washington. Columbia County is a county located in the U.S. state of Washington. As of the 2010 census, the population was 4,078, making it the third-least populous county in Washington. The county seat and largest city is Dayton. The county was created out of Walla Walla County on November 11, 1875 and is named after the Columbia River.