The City of Rock Island is an incorporated place (Class Code P1) located in Douglas County at latitude 47.3729 and longitude -120.1369. Douglas County is in the Pacific time zone (GMT -8). The elevation is 640 feet.
The formal official name is the City of Rock Island, but most people and references simply refer to it as Rock Island, Washington.
The P1 Census Class Code for Rock Island indicates a populated place that is also an incorporated place with the same name and the same census code. The Incorporated Place has a Functional Status Code "A" which identifies an active government providing primary general-purpose functions.
The formal boundaries for the City of Rock Island (see map below) encompass a land area of 0.62 sq. miles and a water area of 0.13 sq. miles.
Alternate Unofficial Names for Rock Island: Hammond.
|Population in Households||781|
|Population in Familes||665|
|Population in Group Qrtrs||0|
|Average Household Size||3.02|
|Average Family Size||4|
|Total Housing Units||279 (100%)|
|Owner Occupied HU||162 (58.1%)|
|Renter Occupied HU||97 (34.8%)|
|Vacant Housing Units||20 ( 7.2%)|
|Median Home Value||$185,000|
|Average Home Value||$281,636|
|Median Household Income||$48,425|
|Average Household Income||$55,932|
|Per Capita Income||$19,342|
|(Compound Annual Growth Rates)|
|Median Household Income||2.11%|
|Per Capita Income||2.4%|
The table below compares Rock Island to the other 628 incorporated cities, towns and CDPs in Washington by rank and percentile using July 1, 2014 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.
|Total Population||# 418||34th|
|Population Density1||# 241||62nd|
|Diversity Index2||# 28||96th|
|Median Household Income||# 379||40th|
|Per Capita Income||# 526||16th|
Additional comparisons and rankings can be made with a VERY EASY TO USE Washington Census Data Comparison Tool.