Seaside Sparrow has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Dick & Marge Bradley | Ninigret mudflats | Charlestown | Washington | 05-Aug-2020 |
| Alex Patterson | Charlestown Breachway | Charlestown | Washington | 11-Jul-2020 |
| Wayne Munns | Ninigrit Breachway | Charlestown | Washington | 11-Jul-2020 |
| Barbara Sherman | Charlestown Breachway | Charlestown | Washington | 07-Jul-2020 |
| Don Heitzmann | Ninigret Mud Flats | Charlestown | Washington | 21-Jun-2020 |
| Greg Nemes | Charlestown Breachway | Charlestown | Washington | 20-Jun-2020 |
| John Magill | Charlestown Breachway | Charlestown | Washington | 09-Jun-2020 |
| Jess Bishop | Breachway | Charlestown | Washington | 30-May-2020 |
| Dominick Pacelli | Breachway | Charlestown | Washington | 27-May-2020 |
| Sue Palmer | Charlestown Breachway Mudflats | Charlestown | Washington | 27-May-2020 |
| Carlos Pedro | Charlestown Breachway | Charlestown | Washington | 18-May-2020 |
| Jan St.Jean | Charlestown Breachway | Portsmouth | Newport | 07-May-2020 |
| Paul L'Etoile | Ninigret Pond | Charlestown | Washington | 03-May-2020 |