The 1920 Armagh County Council election was held on Saturday, 5 June 1920.
The results were as follows:[1]
| Party | valign=top | Seats | valign=top | ± | valign=top | First Pref. votes | valign=top | FPv% | valign=top | ±% |
|---|---|---|---|---|---|---|---|---|---|---|
| 14 | ||||||||||
| 5 | ||||||||||
| 3 | ||||||||||
| 1 | ||||||||||
| Totals | align=right | 23 | align=right | 100% | — |
There was no contest in Portsdown Electoral Division, as only 4 candidates were nominated for the 4 seats.