Last official estimated population of Rock Island city (Douglas County**, Washington state) was 792 (year 2014)[1]. This was 0% of total US population and 0.01% of total Washington state population. Area of Rock Island city is 0.8 mi² (=1.9 km²)[6], in this year population density was 1,053.19 p/mi². If population growth rate would be same as in period 2010-2014 (+0.13%/yr), Rock Island city population in 2026 would be 804*.
Historical population of Rock Island city for period 1940-2014:
Estimated population for 2014[1]. Click on flag to hide it.
Population • Legends • Position
[1940-1950] -0.46 %/yr
[1950-1960] -3.2 %/yr
[1960-1970] -3.04 %/yr
[1970-1980] +9.9 %/yr
[1980-1990] +0.5 %/yr
[1990-2000] +5.25 %/yr
[2000-2005] -1.48 %/yr
[2005-2010] -0.28 %/yr
[2010-2014] +0.13 %/yr
• Wenatchee city population
9.7 mi, 
292°
• East Wenatchee city
7.4 mi, 294°
• Ephrata city
28.5 mi, 
98°
• Quincy city
16.5 mi, 
125°
• Cashmere city
18.4 mi, 
303°
• Leavenworth city
29 mi, 301°
• Kittitas city
29.9 mi, 
206°
• Waterville town
19.3 mi, 
9°
• Entiat city
21.4 mi, 
349°
• George city
24.6 mi, 
147°
*Calculated by population.us from last known population growth rate, not official data.
**Some cities are placed on more than one county. Only 1 county is shown.
[1] Cities and Towns (Incorporated Places and Minor Civil Divisions) 2014, archived from the original, retrieved 02/23/2016
[2] City and Town Intercensal Estimates (2000-2010), archived from the original, retrieved 02/23/2016
[3] Places: 1990 and 1999 Populations, With Numeric and Percent Population Change, archived from the original, retrieved 02/23/2016
[4] Population of the 100 Largest Urban Places: 1980,
[5] Population of the 100 Largest Urban Places in history,
[6] Area, latitude longitude data, retrieved 02/23/2016
[7] Through the Decades, Overview 1790-2010, PDF, large files! >100 Mb
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