patty duke turned down the part as she did not want to work at the time. rock island is a city in and the county seat of rock island county, illinois, united states. the average household size was 2.59 and the average family size was 3.08.

in the city, the population was spread out, with 28.8% under the age of 18, 8.2% from 18 to 24, 27.7% from 25 to 44, 22.8% from 45 to 64, and 12.5% who were 65 years of age or older. 