Rock Island City, Washington
As of the census of 2000, there were 863 people in the city, organized into 270 households, and 204 families living in the city. The population density was 1460.9 people per square mile (564.06/kmē), it is the 196th most densely populated city in the U.S. state of Washington. There were 276 housing units at an average density of 467.8 per square mile (180.62/kmē). The average household size was 3.2 and the average family size was 3.66. In the city the population was spread out, with 35.7% under the age of 18, 9.8% from 18 to 24, 29% from 25 to 44, 17.1% from 45 to 64, and 8.3% who were 65 or older. For every 100 females there were 96.1 males. For every 100 females age 18 and over, there were 94.7 males. The median age was 28.8 years, The median age of males and females living in Rock Island City was 29.5 and 27.9 years respectively. The racial or ethnic makeup of the city was 640 White, 7 Black or African American, 13 American Indian, 6 Asian, Native Hawaiian, 21 from two or more races and 176 Ohter races.
The median income for a household in the city was $33618, it is Washington's 168th poorest city by median household income. The median income for a family in the city was $34408, it is the 95th poorest city in terms of median family income. The per capita income for the city was $14129, it is Washington's 98th poorest city by per capita income. The median income was $16047, Median income for males is $17596, compared with $14191 for females.
In 2000, 310 pupils and students, of which 52.26% are male and 47.74% are female, 35.92% of the total population, are in the education system. Of which, percentage of enrollment student are in, 2.58% nursery or pri school, 10% kindergarten, 45.16% elementary school, 33.55% high school and 8.71% College graduate school.
| Year | Population |
|---|---|
| April 2000 census | 863 |
| April 2000 Estimate | 863 |
| July 2000 Estimate | 864 |
| July 2001 Estimate | 860 |
| July 2002 Estimate | 853 |
| July 2003 Estimate | 848 |
| July 2004 Estimate | 846 |
| July 2005 Estimate | 843 |
| July 2006 Estimate | 839 |
| July 2007 Estimate | 841 |
| July 2008 Estimate | 827 |
| School | Male | Female | Total |
|---|---|---|---|
| Nursery school | 2 | 6 | 8 |
| Kindergarten | 18 | 13 | 31 |
| Elementary school | 79 | 61 | 140 |
| High school | 51 | 53 | 104 |
| College or graduate school | 12 | 15 | 27 |
| Place | Median household income | Median family income | Per capita income |
|---|---|---|---|
| Rock Island city, Washington | $33618 | $34408 | $14129 |
| Douglas County, Washington | $38464 | $43777 | $17148 |
| Washington, United States | $45776 | $53760 | $22973 |
| United States | $41994 | $50046 | $21587 |