| County : | Clay County |
| State : | Iowa (IA) |
| Land Area : | 567.23 sq mi |
| Water Area : | 5.35 sq mi |
| Latitude : | 43.0798220 |
| Longitude : | -95.1497261 |
| Population (2010): | 16,667 |
| Population Estimate (2012) : | 16,649 |
| Population Density : | 29.38/sq mi |
| Housing Units (2012) : | 8,062 |
| Median Household Income (2012) : | $46,880 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $62,827 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $102,600 (Iowa : $123,000, USA : $181,400) |
Clay County Cities / Towns
| Dickens City (185) | Everly City (603) | Fostoria City (231) |
| Gillett Grove City (49) | Greenville City (75) | Peterson City (334) |
| Rossie City (70) | Royal City (446) | Spencer City (11,233) |
| Webb City (141) |
Clay County Zip Codes
| 50515 (279) | 50585 (1,176) | 51033 (428) |
| 51047 (646) | 51058 (1,007) | 51301 (12,691) |
| 51333 (522) | 51338 (1,000) | 51341 (49) |
| 51343 (238) | 51346 (2,451) | 51357 (728) |
| 51358 (1,310) | 51364 (690) | 51366 (379) |