Rock Island is the common name for the community and surrounding area while the formal official name is the City of Rock Island.
The formal boundaries for the City of Rock Island (see map) encompass a land area of 0.61 sq. miles and a water area of 0.14 sq. miles.
Alternate Unofficial Names for Rock Island: Hammond.Photos of the local Rock Island, WA area
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.
|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 Demographic Data for the 1,481 Washington cities, towns, counties, ZIP Codes and Census Designated Places (CDPs) profiled in this gazetteer is updated annually. Last Update: July 1, 2014.
The ZIP Code maps and the data regarding the number of residential and business addresses in each ZIP Code are updated four times per year. Last Update: November 1, 2014.
The information on the 42,524 Washington Physical, Cultural and Historic Features is updated six times per year. Last Update: December 2, 2014.
The School Attendance Zone Maps for 2,201 Washington public schools are updated four times per year. Last Update: October 6, 2014.