| Forest Lake | 1990 | Census 1990 | Single-Family Detached | 3338 |
| Forest Lake | 2000 | Census 2000 | Single-Family Detached | 4080 |
| Forest Lake | 2010 | Estimates 2010 | Single-Family Detached | 5072 |
| Forest Lake | 2018 | Estimates 2018 | Single-Family Detached | 5337 |
| Forest Lake | 1990 | Census 1990 | Townhomes (single-family attached) | 134 |
| Forest Lake | 2000 | Census 2000 | Townhomes (single-family attached) | 207 |
| Forest Lake | 2010 | Estimates 2010 | Townhomes (single-family attached) | 1068 |
| Forest Lake | 2018 | Estimates 2018 | Townhomes (single-family attached) | 1114 |
| Forest Lake | 1990 | Census 1990 | Duplex, triplex and quad | 136 |
| Forest Lake | 2000 | Census 2000 | Duplex, triplex and quad | 215 |
| Forest Lake | 2010 | Estimates 2010 | Duplex, triplex and quad | 187 |
| Forest Lake | 2018 | Estimates 2018 | Duplex, triplex and quad | 187 |
| Forest Lake | 1990 | Census 1990 | Multifamily (5 units or more) | 923 |
| Forest Lake | 2000 | Census 2000 | Multifamily (5 units or more) | 939 |
| Forest Lake | 2010 | Estimates 2010 | Multifamily (5 units or more) | 1062 |
| Forest Lake | 2018 | Estimates 2018 | Multifamily (5 units or more) | 1493 |
| Forest Lake | 1990 | Census 1990 | Manufactured Home | 202 |
| Forest Lake | 2000 | Census 2000 | Manufactured Home | 153 |
| Forest Lake | 2010 | Estimates 2010 | Manufactured Home | 120 |
| Forest Lake | 2018 | Estimates 2018 | Manufactured Home | 130 |
| Forest Lake | 1990 | Census 1990 | Other (Boat, RV, etc.) | 20 |
| Forest Lake | 2000 | Census 2000 | Other (Boat, RV, etc.) | 0 |
| Forest Lake | 2010 | Estimates 2010 | Other (Boat, RV, etc.) | 0 |
| Forest Lake | 2018 | Estimates 2018 | Other (Boat, RV, etc.) | 0 |
| Forest Lake | 2018 | Estimates 2018 | Accessory Dwelling Unit | 0 |