| Place Name | Newcastle Township |
| Place Type | Township |
| ZIP Code(s) | 57025 68757 68770 |
| County | Dixon County |
| Area Code(s) | 402,531 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 532 |
| Majority Ethnicity | White 99.43% |
| Metro/Micro Stats Area | Sioux City, IA-NE-SD |
| US Congressional District(s) | Nebraska 3rd |
| State Legislature Districts | 40 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.43% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.57% |