| County : | Clayton County |
| State : | Iowa (IA) |
| Land Area : | 778.53 sq mi |
| Water Area : | 14.13 sq mi |
| Latitude : | 42.8409979 |
| Longitude : | -91.3235108 |
| Population (2010): | 18,129 |
| Population Estimate (2012) : | 18,056 |
| Population Density : | 23.29/sq mi |
| Housing Units (2012) : | 8,999 |
| Median Household Income (2012) : | $46,617 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $56,939 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $98,500 (Iowa : $123,000, USA : $181,400) |
Clayton County Cities / Towns
| Clayton City (43) | Edgewood City (864) | Elkader City (1,273) |
| Elkport City (37) | Farmersburg City (302) | Garber City (88) |
| Garnavillo City (745) | Guttenberg City (1,919) | Luana City (269) |
| Mcgregor City (871) | Marquette City (375) | Millville City (30) |
| Monona City (1,549) | North Buena Vista City (121) | Osterdock City (59) |
| Postville City (2,227) | St. Olaf City (108) | Strawberry Point City (1,279) |
| Volga City (208) |
Clayton County Zip Codes
| 50606 (885) | 52035 (1,010) | 52042 (1,999) |
| 52043 (2,321) | 52044 (153) | 52047 (567) |
| 52048 (333) | 52049 (1,270) | 52050 (515) |
| 52052 (3,136) | 52053 (1,163) | 52066 (80) |
| 52072 (381) | 52073 (1,414) | 52076 (2,295) |
| 52077 (398) | 52141 (1,435) | 52156 (659) |
| 52157 (1,828) | 52158 (314) | 52159 (2,330) |
| 52162 (3,285) |