| Orono | 1990 | Census 1990 | Single-Family Detached | 2730 |
| Orono | 2000 | Census 2000 | Single-Family Detached | 2845 |
| Orono | 2010 | Estimates 2010 | Single-Family Detached | 2952 |
| Orono | 2020 | Estimates 2020 | Single-Family Detached | 3182 |
| Orono | 2023 | Estimates 2023 | Single-Family Detached | 3226 |
| Orono | 1990 | Census 1990 | Townhomes (single-family attached) | 18 |
| Orono | 2000 | Census 2000 | Townhomes (single-family attached) | 42 |
| Orono | 2010 | Estimates 2010 | Townhomes (single-family attached) | 74 |
| Orono | 2020 | Estimates 2020 | Townhomes (single-family attached) | 110 |
| Orono | 2023 | Estimates 2023 | Townhomes (single-family attached) | 139 |
| Orono | 1990 | Census 1990 | Duplex, triplex and quad | 24 |
| Orono | 2000 | Census 2000 | Duplex, triplex and quad | 19 |
| Orono | 2010 | Estimates 2010 | Duplex, triplex and quad | 30 |
| Orono | 2020 | Estimates 2020 | Duplex, triplex and quad | 6 |
| Orono | 2023 | Estimates 2023 | Duplex, triplex and quad | 6 |
| Orono | 1990 | Census 1990 | Multifamily (5 units or more) | 2 |
| Orono | 2000 | Census 2000 | Multifamily (5 units or more) | 0 |
| Orono | 2010 | Estimates 2010 | Multifamily (5 units or more) | 153 |
| Orono | 2020 | Estimates 2020 | Multifamily (5 units or more) | 131 |
| Orono | 2023 | Estimates 2023 | Multifamily (5 units or more) | 203 |
| Orono | 1990 | Census 1990 | Manufactured Home | 0 |
| Orono | 2000 | Census 2000 | Manufactured Home | 0 |
| Orono | 2010 | Estimates 2010 | Manufactured Home | 0 |
| Orono | 2020 | Estimates 2020 | Manufactured Home | 0 |
| Orono | 2023 | Estimates 2023 | Manufactured Home | 0 |
| Orono | 1990 | Census 1990 | Other (Boat, RV, etc.) | 13 |
| Orono | 2000 | Census 2000 | Other (Boat, RV, etc.) | 0 |
| Orono | 2010 | Estimates 2010 | Other (Boat, RV, etc.) | 0 |
| Orono | 2020 | Estimates 2020 | Other (Boat, RV, etc.) | 0 |
| Orono | 2023 | Estimates 2023 | Other (Boat, RV, etc.) | 0 |
| Orono | 2020 | Estimates 2020 | Accessory Dwelling Unit | 0 |
| Orono | 2023 | Estimates 2023 | Accessory Dwelling Unit | 5 |