The City of Rock Island had a population of 816 as of July 1, 2015. Rock Island ranks in the upper quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Washington. See peer rankings below.
The primary coordinate point for Rock Island is located at latitude 47.3729 and longitude -120.1369 in Douglas County. 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. Douglas County is in the Pacific time zone (GMT -8). The elevation is 640 feet.
The City of Rock Island (GNIS ID: 2410975) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.
Beneath the boundary map are tables with Rock Island population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2015.
Alternate Unofficial Names for Rock Island: Hammond.
|Population in Households||816|
|Population in Familes||698|
|Population in Group Qrtrs||0|
|Average Household Size||3.0|
|Average Family Size||4|
|Total Housing Units||289 (100%)|
|Owner Occupied HU||169 (58.5%)|
|Renter Occupied HU||103 (35.6%)|
|Vacant Housing Units||17 ( 5.9%)|
|Median Home Value||$205,208|
|Average Home Value||$293,047|
|Median Household Income||$42,714|
|Average Household Income||$54,045|
|Per Capita Income||$18,771|
|(Compound Annual Growth Rates)|
|Median Household Income||2.96%|
|Per Capita Income||2.76%|
The table below compares Rock Island to the other 628 incorporated cities, towns and CDPs in Washington by rank and percentile using July 1, 2015 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||# 416||34th|
|Population Density1||# 230||64th|
|Diversity Index2||# 30||95th|
|Median Household Income||# 453||28th|
|Per Capita Income||# 544||14th|
Additional comparisons and rankings can be made with a VERY EASY TO USE Washington Census Data Comparison Tool.