Waterloo City, Illinois
As of the census of 2000, there were 7614 people, 2912 households, and 2077 families residing in the city. The population density was 1367.8 people per square mile (528.11/kmē), making its Illinois's 588th most densely populated city. There were 3015 housing units at an average density of 541.3 per square mile (209/kmē). The average household size was 2.53 and the average family size was 3.05. In the city the population was spread out, with 26.1% under the age of 18, 8.1% from 18 to 24, 30.4% from 25 to 44, 19.3% from 45 to 64, and 16% who were 65 or older. For every 100 females there were 88.7 males. For every 100 females age 18 and over, there were 84.9 males. The median age was 36.4 years, The median age of males was 34.2 years, for females the median age was 38.5 years. The racial makeup of the city was 98.78% White, 0.01% Black or African American, 0.29% American Indian, 0.33% Asian, 0% Native Hawaiian, 0.42% from two or more races and 0.17% Other races.
The median income for a household in the city was $46938, it would be the 352nd highest city by median household income in the U.S. state of Illinois. The median income for a family in the city was $57894, it is Illinois's 279th wealthiest city by median family income. The per capita income for the city was $21081, making it the 326th highest city by per capita income in Illinois. The median income was $25242, Males have a median income of $35417 versus $20857 for females.
In 2000, 1864 pupils and students, of which 45.98% are male and 54.02% are female, 24.48% of the total population, are in the education system. Of which, percentage of enrollment student are in, 7.14% nursery or pri school, 4.94% kindergarten, 47% elementary school, 22.96% high school and 17.97% College graduate school.
| Year | Population |
|---|---|
| April 2000 census | 7614 |
| April 2000 Estimate | 8118 |
| July 2000 Estimate | 8168 |
| July 2001 Estimate | 8377 |
| July 2002 Estimate | 8636 |
| July 2003 Estimate | 8906 |
| July 2004 Estimate | 9093 |
| July 2005 Estimate | 9238 |
| July 2006 Estimate | 9464 |
| July 2007 Estimate | 9629 |
| July 2008 Estimate | 9813 |
| School | Male | Female | Total |
|---|---|---|---|
| Nursery school | 55 | 78 | 133 |
| Kindergarten | 48 | 44 | 92 |
| Elementary school | 425 | 451 | 876 |
| High school | 212 | 216 | 428 |
| College or graduate school | 117 | 218 | 335 |
| Place | Median household income | Median family income | Per capita income |
|---|---|---|---|
| Waterloo city, Illinois | $46938 | $57894 | $21081 |
| Monroe County, Illinois | $55320 | $62397 | $22954 |
| Illinois, United States | $46590 | $55545 | $23104 |
| United States | $41994 | $50046 | $21587 |