Bekir Bozdag has said 32,000 people have been arrested in the investigation of a religious movement that staged a coup.
In a live interview with broadcaster NTV, Bozdag also said a total of about 70,000 people have faced legal proceedings on suspicion of links with U.S.-based cleric Fethullah Gulen, whom the government says engineered the failed coup.
Gulen, who lives in the United States, denies any involvement.
Turkey is building a new courthouse in the town of Sincan, near the capital Ankara, and needs more facilities in order to prosecute all of the Gulen followers implicated in the coup plot, Bozdag said.
Turkey deems the Gulen movement as a terrorist organisation.