| 5/26/66 23:00 | Fort Lee | VA | USA | Light | 5-10 Minutes | Light Over Fort Lee, Virginia, 1966 | 11/21/10 | |
| 5/24/66 21:45 | Hayward | WI | USA | Disk | 20 minutes | Hayward, Wisconsin UFO Sighting in 1966. | 10/12/18 | |
| 5/20/66 01:00 | Holly | MI | USA | Light | Thirty seconds-one minute | No visible craft, very early morning, outside, bright white illumination. | 9/19/02 | |
| 5/19/66 20:00 | Lexington | KY | USA | Other | one hour | The Day I Realized We Are Not Alone: My First Sighting Of A Space Vehicle | 1/3/01 | |
| 5/15/66 22:00 | | AZ | USA | Disk | 10 minutes | Driving late at night in the middle of the desert, I stopped and watched a spaceship hovering close enough to see windows circling it | 7/4/12 | |
| 5/15/66 22:00 | Mentone | AL | USA | Egg | 10 seconds | Both objects skirted the top of the ridge, keeping equi-distant with each other; traveling very fast. | 7/25/04 | |
| 5/15/66 17:00 | Nanakuli | HI | USA | Disk | 5-6 MINS | Flying saucers hovering above our house... I'll remember for the rest of my life! | 6/12/08 | |
| 5/15/66 | Gering | NE | USA | Unknown | | FLYING MOON OVER GERING NEBRASKA | 12/3/04 | |
| 5/12/66 21:30 | Salida | CO | USA | Cone | 1 hour | Super bright object in NW sky. | 7/31/21 | |
| 5/11/66 19:30 | East Liverpool | OH | USA | Triangle | 10 minutes | silver triangle seen early evening by school choir | 5/27/03 | |
| 5/10/66 | Tulsa | OK | USA | Rectangle | 10 min | V shape object moving in a V shape. | 6/18/04 | |
| 5/5/66 17:00 | Beltsville | MD | USA | Sphere | 2minutes | Green sphere speeding across the sky in 1960's | 4/16/05 | |
| 5/4/66 22:30 | Southampton (UK/England) | | United Kingdom | Triangle | 2 mins | Huge triangular craft with with hundreds of star like lights in sets of 3 covering under side. | 10/30/06 | |
| 5/4/66 20:00 | Lambertville | MI | USA | Sphere | ~2 hours | Spherical UFO witnessed in the 1960's which was ON THE GROUND. | 5/13/15 | |
| 5/1/66 00:00 | Kent | WA | USA | Sphere | 20 minutes | Boeing testing a flying saucer | 5/11/05 | |
| 5/1/66 17:00 | Michigan City | IN | USA | Rectangle | 20 minutes | Rectangular ufo, extremely large, dark red, metal shapes visible, no noise, seen on a clear sunny day. | 12/12/09 | |
| 5/1/66 03:00 | Omaha | NE | USA | Cigar | unkwown exact duration | Possible abduction level 3 encounter | 2/14/08 | |