The following are some demographic statistics about the population and steets in Knowles City. The 2010 Census reported that the median age was 33.3. This is slightly younger than the statewide median of 38.5, but still above the countywide average of 34.4. The percentage of the population that was under the age of 18 was 28 percent, which is higher than the statewide or countywide average. This number is comparable to neighboring communities. The percentage of residents that was over the age of 65 is also important to consider when evaluating the area's per capita housing and public services.