Over 13,000 people have been detained so far in a vast sweep in the wake of the July 15 coup bid, which the authorities blame on the reclusive US-based Islamic cleric Fethullah Gulen.
Istanbul anti-terror prosecutors issued arrest warrants for 42 journalists as part of the investigation into the failed coup, the state-run Anadolu news agency said.
Among those targeted by the warrants were prominent journalist Nazli Ilicak who was fired from the pro-government Sabah daily in 2013 for criticising ministers caught up in a corruption scandal, it added.
There was no indication any of the journalists had been detained so far.
The government blamed the 2013 corruption scandal on Gulen, with some officials at the time calling it a coup bid aimed at ousting the president.
Erdogan's government had been under fire even before the failed putsch for restricting press freedoms in Turkey, accusations the authorities strongly deny.