| Owner | Count | 1.
| Unlocated. | 29174 | 2.
| Unocal Land & Development Company, Brea, California | 1 | 3.
| Unocal Service Station, Delano, Minnesota | 1 | 4.
| Unruh Building, Sacramento, California | 2 | 5.
| Unruh Building Sacramento, California | 1 | 6.
| Unruh, Cecil, Rockwall, Texas | 1 | 7.
| Unsell, Rhona, | 1 | 8.
| Untermyer Park, Yonkers, New York | 2 | 9.
| Untermyer, Samuel, Mr, | 1 | 10.
| Unthank Park, Portland, Oregon | 1 |
|