| Official Name: | Sidney Township |
| Settlement Type: | Township |
| Unit Pref: | imperial |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Iowa |
| Subdivision Type2: | County |
| Subdivision Name2: | Fremont |
| Area Total Km2: | 190.1 |
| Area Land Km2: | 189.67 |
| Area Water Km2: | 0.43 |
| Area Total Sq Mi: | 73.4 |
| Area Land Sq Mi: | 73.23 |
| Area Water Sq Mi: | 0.16 |
| Area Water Percent: | 0.22 |
| Population As Of: | 2010 |
| Population Footnotes: | [1] |
| Population Total: | 1741 |
| Population Density Km2: | 9.2 |
| Population Density Sq Mi: | 23.8 |
| Elevation M: | 319 |
| Elevation Ft: | 1047 |
| Coordinates: | 40.7478°N -95.6767°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 51640, 51648, 51652, 51654 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0468706 |
Sidney Township is one of thirteen townships in Fremont County, Iowa, United States. As of the 2010 census, its population was 1,741 and it contained 767 housing units.[1]
As of the 2010 census, Sidney Township covered an area of ; of this, (99.78 percent) was land and (0.22 percent) was water.[1]
The township contains Abshire Cemetery, Acord Cemetery, Benson Cemetery, Fremont County Cemetery, Grandview Cemetery, Hume Cemetery, Knox Cemetery, Lacy Cemetery, Parsley Cemetery, Rector Cemetery, Redd Cemetery and Sidney Cemetery.