| Official Name: | Lewis Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Nebraska |
| Subdivision Type2: | County |
| Subdivision Name2: | Clay |
| Area Total Km2: | 92.16 |
| Area Land Km2: | 92.11 |
| Area Water Km2: | 0.05 |
| Area Total Sq Mi: | 35.58 |
| Area Land Sq Mi: | 35.56 |
| Area Water Sq Mi: | 0.02 |
| Area Water Percent: | 0.05 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 125 |
| Population Density Km2: | 1.7 |
| Population Density Sq Mi: | 4.5 |
| Elevation M: | 538 |
| Elevation Ft: | 1765 |
| Coordinates: | 40.5692°N -98.0006°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0838085 |
Lewis Township is one of sixteen townships in Clay County, Nebraska, United States. The population was 125 at the 2020 census.[1] A 2021 estimate placed the township's population at 125.[1]