| Official Name: | Ainsworth, Indiana |
| Settlement Type: | Neighborhood |
| Pushpin Map: | Indiana#USA |
| Pushpin Label: | Ainsworth |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Lake |
| Subdivision Type3: | Township |
| Subdivision Name3: | Ross |
| Population As Of: | 2000 |
| Population Total: | 320 |
| Coordinates: | 41.4878°N -87.2586°W |
| Elevation Ft: | 663 |
| Postal Code Type: | ZIP code |
| Postal Code: | 46342 (Hobart) |
| Area Code: | 219 |
| Blank Name: | FIPS code |
| Blank Info: | 18-00694[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 430149 |
Ainsworth is a neighborhood of Hobart, Indiana. Prior to the early 1990s, it was an unincorporated community in Ross Township, Lake County, Indiana.
The Grand Trunk Railroad was extended to Ainsworth in 1880.[2]
In the early 1990s the area containing Ainsworth was annexed by the city of Hobart. A failed attempt to fight the annexation would have seen the area incorporated into the town of Ainsworth, thus bringing back the name of the old village. It is located near the intersection of Indiana State Road 51 and the Canadian National Railway (formerly the Grand Trunk Western Railroad).