| Josef Boleslav Pecka | |
| Office1: | Leader of the Social Democratic Party |
| Term Start1: | 1878 |
| Term End1: | 1887 |
| Predecessor1: | Position established |
| Successor1: | Josef Hybeš |
| Birth Name: | Josef Boleslav Pecka-Strahovský |
| Birth Date: | 19 September 1849 |
| Birth Place: | Prague, Austrian Empire |
| Death Place: | Chicago, United States |
Josef Boleslav Pecka (19 September 1849 – 25 July 1897) was a Czech journalist, poet and social democratic politician.[1]