Turkey replaced its parliamentary system with an executive presidency, concentrating power in the president and abolishing the office of Prime Minister.
Key Facts
- Vote result (Yes)
- Approximately 51%
- Vote result (No)
- Approximately 49%
- Amendments proposed
- 18 constitutional amendments
- Parliament seats change
- Raised from 550 to 600 seats
- Disputed unstamped ballots
- Up to 1.5 million ballots
- Referendum date
- 16 April 2017
By the Numbers
Location
Cause → Event → Consequence
The governing AKP and its founder Recep Tayyip Erdoğan had long sought an executive presidency. Following the failed military coup of July 2016 and a declared state of emergency, the AKP secured the support of the Nationalist Movement Party (MHP) in October 2016, giving them enough parliamentary backing to submit the constitutional amendments to a public referendum in January 2017.
On 16 April 2017, Turkish voters were asked to approve 18 amendments to the constitution. The Supreme Electoral Council's controversial mid-count decision to accept non-stamped ballots as valid drew widespread criticism. The 'Yes' side prevailed with roughly 51% of the vote, though OSCE and PACE monitors declared the process did not meet international standards.
The amendments abolished the office of Prime Minister and replaced Turkey's parliamentary system with an executive presidency granting the president broad appointment powers, including over the Supreme Board of Judges and Prosecutors. The result triggered large-scale protests domestically and a diplomatic crisis with the Netherlands, while European institutions formally criticized both the campaign conditions and the YSK's procedural decision.