| County : | Marshall County |
| State : | Iowa (IA) |
| Land Area : | 572.50 sq mi |
| Water Area : | 0.70 sq mi |
| Latitude : | 42.0416910 |
| Longitude : | -92.9814523 |
| Population (2010): | 40,648 |
| Population Estimate (2012) : | 40,568 |
| Population Density : | 71.00/sq mi |
| Housing Units (2012) : | 16,831 |
| Median Household Income (2012) : | $49,259 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $59,515 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $104,000 (Iowa : $123,000, USA : $181,400) |
Marshall County Cities / Towns
| Albion City (505) | Clemons City (148) | Ferguson City (126) |
| Gilman City (509) | Green Mountain (126) | Haverhill City (173) |
| Laurel City (239) | Le Grand City (938) | Liscomb City (301) |
| Marshalltown City (27,552) | Melbourne City (830) | Rhodes City (305) |
| St. Anthony City (102) | State Center City (1,468) |
Marshall County Zip Codes
| 50005 (730) | 50051 (283) | 50078 (126) |
| 50106 (1,039) | 50120 (323) | 50141 (569) |
| 50142 (931) | 50148 (432) | 50158 (31,591) |
| 50162 (1,233) | 50206 (526) | 50234 (613) |
| 50239 (210) | 50247 (2,515) | 50258 (1,002) |
| 50609 (446) | 50621 (1,530) | 50632 (1,107) |
| 50635 (1,602) |