| Official Name: | Klaasville, Indiana |
| Pushpin Map: | Indiana#USA |
| Pushpin Label: | Klaasville |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Lake |
| Subdivision Type3: | Township |
| Subdivision Name3: | Hanover |
| Coordinates: | 41.3558°N -87.5175°W |
| Elevation Ft: | 712 |
| Postal Code Type: | ZIP code |
| Postal Code: | 46303 (Cedar Lake) |
| Area Code: | 219 |
| Blank Name: | FIPS code |
| Blank Info: | 18-40104[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 437373 |
Klaasville is an unincorporated community in Hanover Township, Lake County, Indiana.
A post office was established at Klaasville in 1882, and remained in operation until it was discontinued in 1902.[2] The community was named for the German American Klaas family of pioneer settlers.[3]