population of hillcrest co
- Hillcrest, Illinois. At the 2000 census, there were 1,158 people, 342 households and 297 families residing in the village. The population density was 2,080.8 per square mile (798.4/kmÂ²). There were 353 housing units at an average density of 634.3 per square mile (243.4/kmÂ²).