| Official Name: | Landusky, Montana |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Montana#USA |
| Pushpin Label: | Landusky |
| Pushpin Label Position: | top |
| Coordinates: | 47.8975°N -108.6222°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Montana |
| Subdivision Type2: | County |
| Subdivision Name2: | Phillips |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 0.09 |
| Area Land Sq Mi: | 0.09 |
| Area Water Sq Mi: | 0.00 |
| Area Total Km2: | 0.23 |
| Area Land Km2: | 0.23 |
| Area Water Km2: | 0.00 |
| Population As Of: | 2020 |
| Population Density Km2: | 97.54 |
| Timezone: | Mountain (MST) |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Elevation Ft: | 4026 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 59546 (Zortman) |
| Area Code: | 406 |
| Blank Name: | FIPS code |
| Blank Info: | 30-42325 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2804314 |
| Population Total: | 22 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 252.87 |
Landusky is an unincorporated community and census-designated place (CDP) in Phillips County, Montana, United States, with a population of 22 per the 2020 census. It is in the southwestern part of the county, in the southwestern part of the Little Rocky Mountains. It sits in the valley of Rock Creek, between Mill Gulch to the northeast and Montana Gulch to the northwest. Ore Street dead-ends in Landusky and leads southwest out of the Little Rockies to Montana Highway 66. The community is served by the Zortman post office, less than 5miles to the northeast across the Little Rockies but by road.
Landusky was first listed as a CDP prior to the 2020 census.