Cissna Park is a village in Pigeon Grove Township, Iroquois County, Illinois, United States. The population was 811 at the 2000 census.Cissna Park is located at 40°33′53″N 87°53′38″W / 40.56472°N 87.89389°W / 40.56472; -87.89389.According to the 2010 census, Cissna Park has a total area of 0.7 square miles, all land.As of the census of 2000, there were 811 people, 375 households, and 217 families residing in the village. The population density was 1,128.5 people per square mile. There were 400 housing units at an average density of 556.6 per square mile. The racial makeup of the village was 99.14% White, 0.5% African American, 0.12% Native American, 0.12% Asian, 0.12% from other races, and 0.25% from two or more races. Hispanic or Latino of any race were 0.74% of the population.There were 375 households out of which 22.9% had children under the age of 18 living with them, 46.7% were married couples living together, 9.3% had a female householder with no husband present, and 41.