| Official Name: | Newcastle Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Nebraska |
| Subdivision Type2: | County |
| Subdivision Name2: | Dixon |
| Area Total Km2: | 102.31 |
| Area Land Km2: | 98.28 |
| Area Water Km2: | 4.02 |
| Area Total Sq Mi: | 39.5 |
| Area Land Sq Mi: | 37.95 |
| Area Water Sq Mi: | 1.55 |
| Area Water Percent: | 3.93 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 439 |
| Population Density Km2: | auto |
| Elevation M: | 423 |
| Elevation Ft: | 1388 |
| Coordinates: | 42.67°N -96.8517°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0838156 |
Newcastle Township is one of thirteen townships in Dixon County, Nebraska, United States. The population was 439 at the 2020 census. A 2021 estimate placed the township's population at 436.[1]