Tarhan Erdem (1933 – 8 June 2022)[1] was a Turkish politician who was the President of KONDA Research and Consultancy, an opinion polling company.

The government, however, failed to achieve a vote of confidence in Parliament, resulting in its dissolution on 21 July 1977 after just one month in office.

Erdem's membership of the Grand National Assembly came to an end after Parliament was dissolved on 12 September 1980 by General Kenan Evren, who led a coup d'état against the government.

His opinion polling company, KONDA, is known to be close to the Justice and Development Party (AKP) government.

After the company's predictions for the 2014 presidential election emerged to have grossly overestimated Recep Tayyip Erdoğan's vote, KONDA issued a public letter of apology.