Population Density

Population density
is the average number of people per unit of land area.
In the U.S., the most common unit of population density is persons
per square mile. The land area measurement excludes lakes
and other water areas within.

Counties with population density less than 100 persons per square mile  Counties with population density of less than 100 persons per square mile  As of April 1, 2007 — prepared in response to legislation passed by the 1999 Washington State Legislature and signed into law: ESSB 5594 ("Relating to enhancing economic vitality") and ESHB 2260 ("Relating to tax incentives in rural counties").
References to population density in Washington law
 
Microsoft Excel File  Population, Land Area and Density for Cities and Towns, April 1
Excel® file containing annual data for 2000 through 2007.
 
Population density map, 2000, census block level, color   Population density map from block level Census data, 2000 (color)
Population density map from block level Census data, 2000 (grayscale)
 
Historical population density maps   Historical county population density maps, 1900-2000   animated

 

Population Density and Land Area by County
Excludes Water Area

Download this table:

County
Land Area, 2000
(sq mi)		Population Density (Persons per Square Mile)
200220032004200520062007
Washington State 66,544.1 90.79 91.64 92.69 94.02 95.81 97.50
Adams 1,925.0 8.62 8.62 8.68 8.83 8.99 9.14
Asotin 635.3 32.58 32.42 32.58 32.90 33.21 33.53
Benton 1,703.1 86.67 89.01 91.07 92.83 94.30 95.65
Chelan 2,921.4 23.14 23.24 23.41 23.69 24.00 24.37
Clallam 1,739.5 37.31 37.54 37.89 38.40 38.98 39.38
Clark 628.2 578.46 592.63 610.13 623.19 642.29 660.59
Columbia 868.8 4.72 4.72 4.72 4.72 4.72 4.72
Cowlitz 1,138.6 82.91 83.34 83.70 84.22 85.01 85.89
Douglas 1,820.5 18.18 18.46 18.79 19.06 19.61 19.94
Ferry 2,204.0 3.31 3.31 3.31 3.36 3.40 3.43
Franklin 1,242.4 41.29 43.14 45.88 48.70 51.67 54.25
Garfield 710.5 3.38 3.38 3.38 3.38 3.38 3.31
Grant 2,681.1 28.50 28.76 29.20 29.50 30.06 30.77
Grays Harbor 1,916.9 35.68 35.89 36.10 36.41 36.73 36.93
Island 208.4 350.71 355.03 358.87 364.62 370.38 376.14
Jefferson 1,814.2 14.66 14.72 14.88 15.21 15.54 15.76
King 2,126.0 834.56 836.91 841.14 850.55 863.25 875.48
Kitsap 396.0 592.72 598.52 604.84 607.11 614.69 618.22
Kittitas 2,297.2 15.15 15.32 15.58 15.93 16.28 16.67
Klickitat 1,872.4 10.31 10.31 10.31 10.41 10.57 10.63
Lewis 2,407.6 29.16 29.24 29.36 29.74 30.28 30.78
Lincoln 2,311.2 4.41 4.37 4.41 4.37 4.41 4.46
Mason 961.1 51.82 52.23 52.86 54.00 55.25 56.81
Okanogan 5,268.1 7.55 7.52 7.52 7.52 7.55 7.55
Pacific 933.0 22.51 22.40 22.51 22.83 23.04 23.15
Pend Oreille 1,400.3 8.43 8.43 8.50 8.71 8.78 9.00
Pierce 1,678.9 431.83 437.01 443.14 450.23 460.71 470.84
San Juan 174.9 83.47 84.61 86.32 88.61 89.75 90.90
Skagit 1,735.1 60.57 61.49 62.70 63.91 65.18 66.45
Skamania 1,656.4 5.98 5.98 6.10 6.22 6.40 6.46
Snohomish 2,089.1 300.61 305.16 308.66 313.92 321.58 328.52
Spokane 1,763.6 241.32 243.02 244.95 247.39 251.64 255.84
Stevens 2,478.3 16.30 16.38 16.42 16.62 16.99 17.35
Thurston 727.0 292.01 295.45 300.54 308.24 317.87 327.36
Wahkiakum 264.2 14.38 14.38 14.38 14.76 14.76 15.14
Walla Walla 1,270.5 43.60 43.92 44.63 45.26 45.57 45.89
Whatcom 2,119.5 81.24 82.33 83.65 85.30 86.95 88.84
Whitman 2,159.4 18.80 18.99 19.31 19.64 19.82 19.77
Yakima 4,296.2 52.37 52.60 52.95 53.37 53.95 54.51

Note: The land area measurement excludes lakes and other water areas within.

Sources:

Last modified: February 06, 2008
E-mail: OFM.Forecasting@ofm.wa.gov