Cisco is a village in Piatt County, Illinois, United States. The population was 264 at the 2000 census.Cisco is located at 40°0′42″N 88°43′33″W / 40.01167°N 88.72583°W / 40.01167; -88.72583.According to the 2010 census, Cisco has a total area of 0.37 square miles, all land.There were 109 households out of which 28.4% had children under the age of 18 living with them, 72.5% were married couples living together, 5.5% had a female householder with no husband present, and 21.1% were non-families. 20.2% of all households were made up of individuals and 7.3% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 2.78.In the village, the population was spread out with 20.8% under the age of 18, 6.8% from 18 to 24, 27.3% from 25 to 44, 25.8% from 45 to 64, and 19.3% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 92.7 males.