Columbia County, Washington

Columbia County is a located in the  of. As of, the population is 4,064. The county seat is at, which is also the county's largest city. It is named after the.

Columbia County was created out of on,.

Geography
According to the, the county has a total area of 2,262 (874 ). 2,250 km² (869 sq mi) of it is land and 12 km² (5 sq mi) of it (0.54%) is water. It is part of the, a wide and rolling prairie-like region of the middle.

Adjacent counties

 * - north
 * - east
 * - southeast
 * - southwest
 * - west
 * - northwest

Demographics
As of the of 2000, there were 4,064 people, 1,687 households, and 1,138 families residing in the county. The was 2/km² (5/sq mi). There were 2,018 housing units at an average density of 1/km² (2/sq mi). The racial makeup of the county was 93.73%, 0.22% or , 0.96% , 0.42% , 0.05% , 2.73% from , and 1.89% from two or more races. 6.35% of the population were or  of any race. 19.6% were of, 18.2% or American, 14.3%  and 8.3%  ancestry according to Census 2000. 94.3% spoke and 5.7%  as their first language.

There were 1,687 households out of which 27.70% had children under the age of 18 living with them, 56.00% were living together, 8.50% had a female householder with no husband present, and 32.50% were non-families. 29.00% of all households were made up of individuals and 13.00% had someone living alone who was 65 years of age or older. The average household size was 2.36 and the average family size was 2.89.

In the county, the population was spread out with 23.90% under the age of 18, 7.00% from 18 to 24, 22.80% from 25 to 44, 27.70% from 45 to 64, and 18.50% who were 65 years of age or older. The median age was 42 years. For every 100 females there were 95.20 males. For every 100 females age 18 and over, there were 94.80 males.

The median income for a household in the county was $33,500, and the median income for a family was $44,038. Males had a median income of $33,690 versus $21,367 for females. The for the county was $17,374. About 8.60% of families and 12.60% of the population were below the, including 15.90% of those under age 18 and 11.10% of those age 65 or over.