| Half Acre, New Jersey | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | USA New Jersey Middlesex County#USA New Jersey#USA |
| Pushpin Label: | Half Acre |
| Pushpin Label Position: | left |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Middlesex |
| Subdivision Type3: | Township |
| Subdivision Name3: | Monroe |
| Elevation Ft: | 148 |
| Coordinates: | 40.3206°N -74.4525°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 876888 |
| Unit Pref: | imperial |
Half Acre is an unincorporated community located within Monroe Township in Middlesex County, in the U.S. state of New Jersey.[1] The settlement is located roughly at the intersection of Prospect Plains Road (County Route 614) and Half Acre Road (CR 615) in the center of the township. Some single-family homes and small businesses are located along those two roads and Cranbury-Half Acre Road but most of the area is made up of age-restricted housing developments including Concordia, Clearbrook Park, Greenbriar at Whittingham, and Encore at Monroe.