Courthouse Hours:
Treasurer
M-F 8:30 AM - 4:00 PM
Assessor/Auditor/Recorder
M-F 8:00 AM - 4:30 PM
Supervisors
M & W 9:00 AM - 4:00 PM
Population Of Clayton County (2000 Census)
Source: U.S. Census Bureau: http://www.census.gov
For detailed census information on each city or township*, click the appropriate name.
| Township | Population | Township | Population |
| Boardman | 367 | Jefferson | 684 |
| Buena Vista | 215 | Lodomillo | 403 |
| Cass | 449 | Mallory | 411 |
| Clayton | 257 | Marion | 389 |
| Cox Creek | 348 | Mendon | 598 |
| Elk | 490 | Millville | 448 |
| Farmersburg | 305 | Monona | 426 |
| Garnavillo | 254 | Read | 300 |
| Giard | 463 | Sperry | 287 |
| Grand Meadow | 344 | Volga | 334 |
| Highland | 237 | Wagner | 305 |
Rural Population Total: 8,314
| City | Population | City | Population |
| Clayton | 55 | McGregor | 871 |
| Edgewood* | 923 (316) | Millville | 23 |
| Elkader | 1,465 | Monona | 1550 |
| Elkport | 88 | North Buena Vista | 124 |
| Farmersburg | 300 | Osterdock | 50 |
| Garber | 103 | Postville* | 2273 (213) |
| Garnavillo | 754 | St Olaf | 136 |
| Guttenberg | 1,987 | Strawberry Point | 1386 |
| Luana | 249 | Volga | 247 |
| Marquette | 421 |
Urban Population Total: 10,338
| Total County Population | |
| 2000 Census | 18,678 |
| 2006 Estimate | 18,251 |
© 2007 Clayton County, Iowa