Turkey's president says the world must respect the results of the election, which saw the ruling Justice and Development Party (AKP) regain its parliamentary majority.
Recep Tayyip Erdogan said voters had chosen stability following unrest.
With almost all ballots counted, state-run Anadolu news agency said the AKP had won 49.4% of the vote, with the main opposition CHP on 25.4%.
European observers have criticised the government for stifling media freedom.
The Organisation for Security and Cooperation in Europe (OSCE) said violence, especially in the country's south-east, had also had a significant impact on the election.
Meanwhile, the Parliamentary Assembly of the Council of Europe (PACE) went further and denounced the entire process as "unfair".