Blen Mesfin (Amharic: ብሌን መስፍን) is an official in Ethiopia’s opposition Semayawi (Blue) Party.  In 2016 she was named one of twenty women political prisoners in the FreeThe20 campaign by Samantha Power, the U.S. Ambassador to the United Nations.
Mesfin was arrested at a protest in Addis Ababa in April 2015. The protest was for 26 Ethiopians killed by the group called Islamic State in Libya. More than 30 members of the Semayawi Party were arrested before an April 27 political rally.
Mesfin was released in December 2016, along with a mass release of 9,800 people detained under the state of emergency. According to Ethiopian journalist Tesfalem Waldyes she was re-arrested during a wave of arrests in October 2016.
- "#Freethe20 - HumanRights.gov is the official United States Government website for international human rights related information". Archived from the original on 16 July 2016. Retrieved 18 July 2016.
- "FreeThe20 Women Political Prisoners and Prisoners of Concern Campaign Launch". Retrieved 18 July 2016.
- "Ethiopia: Respect court rulings and release opposition members". Retrieved 18 July 2016.
- +ecadforum (26 April 2014). "Ethiopia: Semayawai(Blue) Party members are being arrested".
- "We're sorry, that page can't be found".
- Power, Samantha (24 December 2016). "Encouraging news:#Ethiopia released Blue Party ldrs,incl Blen Mesfin.Cannot rest until pol prisoners everywhere are #FreeToBeHome.#FreeThe20pic.twitter.com/ysqxY9g1Rv".
- AfricaNews (24 December 2016). "Ethiopia's mass release of 'detainees' excites top US officials, call for more". Africanews.
- Waldyes, Tesfalem (11 October 2016). "Here comes another wave of arrest in #Ethiopia. Blen Mesfin of Blue Party & part of @AmbassadorPower's #Freethe20 campaign re-arrested today".