| Douglas Township | 1990 | Census 1990 | Single-Family Detached | 179 |
| Douglas Township | 2000 | Census 2000 | Single-Family Detached | 226 |
| Douglas Township | 2010 | Estimates 2010 | Single-Family Detached | 273 |
| Douglas Township | 2020 | Estimates 2020 | Single-Family Detached | 264 |
| Douglas Township | 2024 | Estimates 2024 | Single-Family Detached | 269 |
| Douglas Township | 1990 | Census 1990 | Townhomes (single-family attached) | 0 |
| Douglas Township | 2000 | Census 2000 | Townhomes (single-family attached) | 0 |
| Douglas Township | 2010 | Estimates 2010 | Townhomes (single-family attached) | 0 |
| Douglas Township | 2020 | Estimates 2020 | Townhomes (single-family attached) | 0 |
| Douglas Township | 2024 | Estimates 2024 | Townhomes (single-family attached) | 0 |
| Douglas Township | 1990 | Census 1990 | Duplex, triplex and quad | 0 |
| Douglas Township | 2000 | Census 2000 | Duplex, triplex and quad | 0 |
| Douglas Township | 2010 | Estimates 2010 | Duplex, triplex and quad | 0 |
| Douglas Township | 2020 | Estimates 2020 | Duplex, triplex and quad | 6 |
| Douglas Township | 2024 | Estimates 2024 | Duplex, triplex and quad | 6 |
| Douglas Township | 1990 | Census 1990 | Multifamily (5 units or more) | 0 |
| Douglas Township | 2000 | Census 2000 | Multifamily (5 units or more) | 0 |
| Douglas Township | 2010 | Estimates 2010 | Multifamily (5 units or more) | 0 |
| Douglas Township | 2020 | Estimates 2020 | Multifamily (5 units or more) | 0 |
| Douglas Township | 2024 | Estimates 2024 | Multifamily (5 units or more) | 0 |
| Douglas Township | 1990 | Census 1990 | Manufactured Home | 19 |
| Douglas Township | 2000 | Census 2000 | Manufactured Home | 14 |
| Douglas Township | 2010 | Estimates 2010 | Manufactured Home | 0 |
| Douglas Township | 2020 | Estimates 2020 | Manufactured Home | 0 |
| Douglas Township | 2024 | Estimates 2024 | Manufactured Home | 0 |
| Douglas Township | 1990 | Census 1990 | Other (Boat, RV, etc.) | 0 |
| Douglas Township | 2000 | Census 2000 | Other (Boat, RV, etc.) | 0 |
| Douglas Township | 2010 | Estimates 2010 | Other (Boat, RV, etc.) | 0 |
| Douglas Township | 2020 | Estimates 2020 | Other (Boat, RV, etc.) | 0 |
| Douglas Township | 2024 | Estimates 2024 | Other (Boat, RV, etc.) | 0 |
| Douglas Township | 2020 | Estimates 2020 | Accessory Dwelling Unit | 0 |
| Douglas Township | 2024 | Estimates 2024 | Accessory Dwelling Unit | 0 |