State: Iowa
        
        Time zone: Eastern GMT -6:00. 
| Population: | 30,883 | 
| 2000 Population: | 31,291 | 
| White Population: | 29,907 | 
| Black Population: | 346 | 
| Hispanic Population: | 1,041 | 
| Asian Population: | 233 | 
| Hawaiian Population: | 56 | 
| Indian Population: | 4 | 
| Other Population: | 321 | 
| Male Population: | 14,910 | 
| Female Population: | 16,381 | 
| Median Age: | 38.4 | 
| Male Median Age: | 36.2 | 
| Female Median Age: | 40.4 | 
| Households: | 13,903 | 
| Average Household Size: | 2.29 | 
| Average House Value: | $73,200 | 
| Average Household Income: | $35,132 | 
| Land Area: | 154.583 sq mi | 
| Water Area: | 0.555 sq mi | 
Central Heights Emery , Hanford , Portland , Winnebago Heights , Mason City
            Mason City, IA (       2.0 miles)
             Rock Falls, IA (       6.5 miles)
             Nora Springs, IA (       8.0 miles)
             Plymouth, IA (       8.9 miles)
             Rockwell, IA (       9.5 miles)
             Clear Lake, IA (      10.0 miles)
             Grafton, IA (      13.5 miles)
             Swaledale, IA (      13.6 miles)
             Rockford, IA (      14.0 miles)
             Ventura, IA (      14.3 miles)
             
| 2000 Population: | 2,926,324 | 
| White Population: | 2,748,640 | 
| Black Population: | 61,853 | 
| Asian Population: | 36,635 | 
| Indian Population: | 8,989 | 
| Hawaiian Population: | 1,009 | 
| Other Population: | 37,420 | 
| Male Population: | 1,435,515 | 
| Female Population: | 1,490,809 | 
| Median Age: | 36.60 | 
| Male Median Age: | 35.20 | 
| Female Median Age: | 38.00 | 
| 2000 Households: | 1,149,276 | 
| White Households: | 1,098,906 | 
| Black Households: | 20,550 | 
| Asian Households: | 10,752 | 
| Indian Households: | 2,720 | 
| Hawaiian Households: | 284 | 
| Average Household Size: | 2.46 | 
| Average Family Size: | 3.00 |