| Official Name: | Smithfield Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Fayette |
| Area Total Km2: | 93.47 |
| Area Land Km2: | 93.47 |
| Area Water Km2: | 0 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 36.09 |
| Area Land Sq Mi: | 36.09 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2010 |
| Population Total: | 250 |
| Population Density Km2: | auto |
| Elevation M: | 360 |
| Elevation Ft: | 1181 |
| Coordinates: | 42.7811°N -91.7803°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 50606, 52142 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0468723 |
Smithfield Township is one of twenty townships in Fayette County, Iowa, USA. As of the 2010 census, its population was 250.[1]
According to the United States Census Bureau, Smithfield Township covers an area of 36.09 square miles (93.47 square kilometers).
The township contains Garden Prairie Cemetery.