| Eureka Township | 1990 | Census 1990 | Single-Family Detached | 437 |
| Eureka Township | 2000 | Census 2000 | Single-Family Detached | 489 |
| Eureka Township | 2010 | Estimates 2010 | Single-Family Detached | 526 |
| Eureka Township | 2020 | Estimates 2020 | Single-Family Detached | 518 |
| Eureka Township | 2022 | Estimates 2022 | Single-Family Detached | 525 |
| Eureka Township | 1990 | Census 1990 | Townhomes (single-family attached) | 4 |
| Eureka Township | 2000 | Census 2000 | Townhomes (single-family attached) | 0 |
| Eureka Township | 2010 | Estimates 2010 | Townhomes (single-family attached) | 0 |
| Eureka Township | 2020 | Estimates 2020 | Townhomes (single-family attached) | 0 |
| Eureka Township | 2022 | Estimates 2022 | Townhomes (single-family attached) | 0 |
| Eureka Township | 1990 | Census 1990 | Duplex, triplex and quad | 11 |
| Eureka Township | 2000 | Census 2000 | Duplex, triplex and quad | 9 |
| Eureka Township | 2010 | Estimates 2010 | Duplex, triplex and quad | 8 |
| Eureka Township | 2020 | Estimates 2020 | Duplex, triplex and quad | 22 |
| Eureka Township | 2022 | Estimates 2022 | Duplex, triplex and quad | 22 |
| Eureka Township | 1990 | Census 1990 | Multifamily (5 units or more) | 0 |
| Eureka Township | 2000 | Census 2000 | Multifamily (5 units or more) | 0 |
| Eureka Township | 2010 | Estimates 2010 | Multifamily (5 units or more) | 0 |
| Eureka Township | 2020 | Estimates 2020 | Multifamily (5 units or more) | 0 |
| Eureka Township | 2022 | Estimates 2022 | Multifamily (5 units or more) | 0 |
| Eureka Township | 1990 | Census 1990 | Manufactured Home | 2 |
| Eureka Township | 2000 | Census 2000 | Manufactured Home | 6 |
| Eureka Township | 2010 | Estimates 2010 | Manufactured Home | 3 |
| Eureka Township | 2020 | Estimates 2020 | Manufactured Home | 0 |
| Eureka Township | 2022 | Estimates 2022 | Manufactured Home | 0 |
| Eureka Township | 1990 | Census 1990 | Other (Boat, RV, etc.) | 3 |
| Eureka Township | 2000 | Census 2000 | Other (Boat, RV, etc.) | 0 |
| Eureka Township | 2010 | Estimates 2010 | Other (Boat, RV, etc.) | 0 |
| Eureka Township | 2020 | Estimates 2020 | Other (Boat, RV, etc.) | 0 |
| Eureka Township | 2022 | Estimates 2022 | Other (Boat, RV, etc.) | 0 |
| Eureka Township | 2020 | Estimates 2020 | Accessory Dwelling Unit | 0 |
| Eureka Township | 2022 | Estimates 2022 | Accessory Dwelling Unit | 0 |