Rock Island, WA Community Profile: Data

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Rock Island, Washington - Basic Facts

Rock Island is the common name for the community and surrounding area while the formal official name is the City of Rock Island.

It is an incorporated place (Class Code P1) located in Douglas County at latitude 47.3771 and longitude -120.144. Douglas County is in the Pacific time zone (GMT -8). The elevation is 640 feet.

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.

Camera Icon Photos of the local Rock Island, WA area

Also See: Rock Island, WA ZIP Codes and ZIP Code Maps

Rock Island, WA - Peer Comparisons by Rank and Percentile

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.

Variable Description Rank Percentile
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.

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Rock Island, WA Data & Demographics (As of July 1, 2014)

POPULATION

Total Population 781
Population in Households 781
Population in Familes 665
Population in Group Qrtrs 0
Population Density1 1,273
Diversity Index2 79
 

HOUSEHOLDS

Total Households 259
Average Household Size 3.02
Family Households 188
Average Family Size 4

HOUSING

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
 

INCOME

Median Household Income $48,425
Average Household Income $55,932
Per Capita Income $19,342
  (Compound Annual Growth Rates)

GROWTH RATES

2010-2014 2014-2019
Population -0.21% 0.05%
Households -0.27% 0.08%
Families 1.16% 0.0%
Median Household Income   2.11%
Per Capita Income   2.4%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Information Updates

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: August 1, 2014.

The information on the 42,525 Washington Physical, Cultural and Historic Features is updated six times per year. Last Update: August 2, 2014.

The School Attendance Zone Maps for 2,199 Washington public schools are updated four times per year. Last Update: July 8, 2014.