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Blue Island (formerly Portland) is a city in Cook County, Illinois. The population was 23,463 at the 2000 census.Blue Island is so named because it is situated south of a ridge of land that was once an island when the glacial Lake Chicago covered the area thousands of years ago. Early pioneers gave the ridge the name because at a distance it looked like an island in set a trackless prairie sea. The blue color has attributed to atmospheric scattering or to blue flowers growing on the ridge. The city is a hub for Metra trains, with five stations, four of them along the Rock Island District Line; 119th Street, 123rd Street, Prairie Street, and Vermont Street. The Vermont Street station serves as the southern terminus of a split between the main branch used strictly for rush hour, and the Suburban Line(otherwise known as the Beverly Branch), and is also in walking distance from another station that serves as the terminus of a Metra Electric branch. Geography Blue Island is located at 41°39′30″N, 87°40′46″W (41.658412, -87.679424).According to the United States Census Bureau, the city has a total area of 4.1 square miles (10.7 km²), of which, 4.0 square miles (10.4 km²) of it is land and 0.1 square miles (0.2 km²) of it (2.18%) is water. 
Demographics As of the 2000 census, there were 23,463 people, 8,247 households, and 5,467 families residing in the city. The population density was 5,822.4 people per square mile (2,247.9/km²). There were 8,750 housing units at an average density of 2,171.3/sq mi (838.3/km²). The racial makeup of the city was 53.68% White, 24.10% African American, 0.60% Native American, 0.37% Asian, 0.03% Pacific Islander, 17.68% from other races, and 3.55% from two or more races. Hispanic or Latino of any race were 37.93% of the population, including 34.0% of Mexican descent.The top four non-Hispanic, non-African American ancentries reported in Blue Island as of the 2000 census were German (11.7%), Irish (10.4%), Polish (6.7%) and Italian (6.6%). There were 8,247 households out of which 37.7% had children under the age of 18 living with them, 40.3% were married couples living together, 19.3% had a female householder with no husband present, and 33.7% were non-families. 28.2% of all households were made up of individuals and 8.8% had someone living alone who was 65 years of age or older. The average household size was 2.84 and the average family size was 3.54. In the city the population was spread out with 30.1% under the age of 18, 10.7% from 18 to 24, 32.1% from 25 to 44, 17.4% from 45 to 64, and 9.8% who were 65 years of age or older. The median age was 30 years. For every 100 females there were 95.9 males. For every 100 females age 18 and over, there were 93.3 males.The median income for a household in the city was $36,520, and the median income for a family was $42,277. Males had a median income of $31,599 versus $26,425 for females. The per capita income for the city was $16,156. About 12.3% of families and 13.3% of the population were below the poverty line, including 16.4% of those under age 18 and 6.6% of those age 65 or over. |
