| Knife Tree | |
| Artist: | Heinz Mack |
| Year: | 1966 |
| Type: | steel |
| Height Imperial: | 112 |
| Width Imperial: | 15 |
| Imperial Unit: | in |
| Metric Unit: | cm |
| City: | Milwaukee, Wisconsin |
| Museum: | Lynden Sculpture Garden |
| Coordinates: | 43.1769°N -87.9369°W |
| Owner: | Bradley Family Foundation |
Knife Tree is a public art work by German artist Heinz Mack located at the Lynden Sculpture Garden near Milwaukee, Wisconsin.[1] The sculpture is an abstract spire with upper elements resembling a feather. It is made of steel plated with chrome; it is installed on the lawn.[2]