| Place Name | Spencer Brook Township |
| Place Type | Township |
| ZIP Code(s) | 55008 55040 55371 55398 |
| County | Isanti County |
| Area Code(s) | 763 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 1,779 |
| Majority Ethnicity | White 95.91% |
| Metro/Micro Stats Area | Minneapolis-St. Paul-Bloomington, MN-WI |
| US Congressional District(s) | Minnesota 8th |
| State House Districts | 31A |
| State Senate Districts | 31 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.91% |
| African American | 0% |
| Hispanic | 0.11% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.98% |