| Official Name: | Washington Township |
| Settlement Type: | Former Township |
| Coordinates: | 36.2542°N -93.0168°W |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Boone |
| Unit Pref: | Imperial |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | Zip Code |
| Area Code: | 870 |
Washington Township is a former township of Boone County, Arkansas, USA. Its last appearance on the US Census was in 1950.
| Census | Population | |
|---|---|---|
| 1950 | 361 | |
| 1940 | 373 | |
| 1930 | 403 | |
| 1920 | 481 | |
| 1910 | 610 | |
| 1900 | 749 | |
| 1890 | 754 | |
| 1880 | 810 | |
| 1870 | 445 | |
| 1860 (area part of Carroll County at the time) | 512 |
The Geographic Names Information System lists 13 townships named Washington in various counties in Arkansas.