| Election Name: | 1920 Sligo County Council election |
| Country: | United Kingdom |
| Type: | Parliamentary |
| Ongoing: | no |
| Party Colour: | yes |
| Previous Election: | 1914 Sligo County Council election |
| Previous Year: | 1914 |
| Next Election: | 1925 Sligo County Council election |
| Next Year: | 1925 |
| Seats For Election: | All 20 seats on Sligo County Council |
| Majority Seats: | 11 |
| Election Date: | 4 June 1920 |
| Party1: | Sinn Féin |
| Seats1: | 20 |
| Party2: | Independent Nationalist |
| Seats2: | 0 |
| Map Size: | 300px |
| Council control | |
| Posttitle: | Council control after election |
| After Election: | Sinn Féin |
An election to Sligo County Council took place on 4 June 1920 as part of that year's Irish local elections. 20 councillors were elected from 5 electoral divisions by PR-STV voting for a five-year term of office.
Sinn Féin won every seat for election, and also won a massive majority of the vote.[1]
| Party | valign=top | Seats | valign=top | ± | valign=top | First Pref. votes | valign=top | FPv% | valign=top | ±% |
|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 13,617 | 91.92 | ||||||||
| 0 | 318 | 2.15 | ||||||||
| 0 | 388 | 2.62 | ||||||||
| 0 | 491 | 3.31 | ||||||||
| Totals | align=right | 20 | align=right | 14,814 | 100.00 | — |