| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. J A Congdon vs F Elder |
 | 0-1 | 28 |
1874 |
3rd American Chess Congress | D00 Queen's Pawn Game |
| 2. F Elder vs J A Congdon |
 | 1-0 | 31 |
1874 |
3rd American Chess Congress | D35 Queen's Gambit Declined |
| 3. F Perrin vs J A Congdon |
 | 1-0 | 24 |
1874 |
3rd American Chess Congress | D30 Queen's Gambit Declined |
| 4. M Judd vs J A Congdon |
 | 1-0 | 50 |
1874 |
3rd American Chess Congress | C42 Petrov Defense |
| 5. J A Congdon vs M Judd |
| 0-1 | 50 |
1874 |
3rd American Chess Congress | C80 Ruy Lopez, Open |
| 6. H Hosmer vs J A Congdon |
| 1-0 | 23 |
1874 |
3rd American Chess Congress | C31 King's Gambit Declined, Falkbeer Counter Gambit |
| 7. J A Congdon vs H Hosmer |
 | 0-1 | 14 |
1874 |
3rd American Chess Congress | C80 Ruy Lopez, Open |
| 8. J A Congdon vs F Bock |
| ½-½ | 32 |
1874 |
3rd American Chess Congress | C01 French, Exchange |
| 9. J A Congdon vs F Perrin |
 | 1-0 | 47 |
1874 |
3rd American Chess Congress | C84 Ruy Lopez, Closed |
| 10. F Bock vs J A Congdon |
| 1-0 | 57 |
1874 |
3rd American Chess Congress | C42 Petrov Defense |
| 11. J A Congdon vs M Judd |
| 0-1 | 21 |
1880 |
5th American Chess Congress | C77 Ruy Lopez |
| 12. J Grundy vs J A Congdon |
 | 1-0 | 42 |
1880 |
5th American Chess Congress | B01 Scandinavian |
| 13. A Cohnfeld vs J A Congdon |
| 1-0 | 38 |
1880 |
5th American Chess Congress | C02 French, Advance |
| 14. J A Congdon vs Sellman |
| 0-1 | 25 |
1880 |
5th American Chess Congress | C01 French, Exchange |
| 15. E Delmar vs J A Congdon |
 | 1-0 | 67 |
1880 |
5th American Chess Congress | B01 Scandinavian |
| 16. J A Congdon vs J Grundy |
| 0-1 | 56 |
1880 |
5th American Chess Congress | C77 Ruy Lopez |
| 17. C Moehle vs J A Congdon |
| 1-0 | 54 |
1880 |
5th American Chess Congress | B01 Scandinavian |
| 18. P Ware vs J A Congdon |
 | ½-½ | 79 |
1880 |
5th American Chess Congress | A00 Uncommon Opening |
| 19. J A Congdon vs E Delmar |
 | ½-½ | 44 |
1880 |
5th American Chess Congress | C61 Ruy Lopez, Bird's Defense |
| 20. J S Ryan vs J A Congdon |
| 0-1 | 55 |
1880 |
5th American Chess Congress | C02 French, Advance |
| 21. J A Congdon vs C Moehle |
| 0-1 | 49 |
1880 |
5th American Chess Congress | C70 Ruy Lopez |
| 22. J A Congdon vs P Ware |
 | 0-1 | 60 |
1880 |
5th American Chess Congress | B00 Uncommon King's Pawn Opening |
| 23. Mackenzie vs J A Congdon |
 | ½-½ | 66 |
1880 |
5th American Chess Congress | C14 French, Classical |
| 24. J A Congdon vs J S Ryan |
| 0-1 | 39 |
1880 |
5th American Chess Congress | C77 Ruy Lopez |
| 25. M Judd vs J A Congdon |
 | 0-1 | 61 |
1880 |
5th American Chess Congress | B01 Scandinavian |