The journalists charged from nine different newspapers included the editor-in-chief of the pro-opposition Cumhuriyet daily Can Dundar who has repeatedly locked horns with President Recep Tayyip Erdogan.
Others also charged include the editors of the Posta daily and the staunchly left-wing and anti-Erdogan Birgun newspaper.
Prosecutor Mehmet Selim Kiraz was held hostage by two captors linked to the Marxist Revolutionary People's Liberation Party-Front (DHKP-C) at his office at Istanbul's main Palace of Justice on March 31.
The DHKP-C had during the siege published pictures showing one of the militants -- his face concealed by a scarf with the group's red and yellow insignia -- holding a gun to the hostage's head in the prosecutor's offices.
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The images were circulated on social media while the siege was going on and were published by several Turkish newspapers as well as news websites.
Prime Minister Ahmet Davutoglu expressed outrage at the publication of the pictures and prosecutors rapidly launched a probe into the newspapers for disseminating "terrorist propaganda".
There has been growing concern about deteriorating press freedoms on Turkey and in particular over the numbers of journalists facing legal proceedings on accusations of insulting Erdogan.
In the run-up to June 7 elections, Erdogan caused outrage by saying Dundar would "pay a heavy price" over a front-page story which it said proved Turkey had sent arms to Islamist rebels in Syria.
Along with the Kurdistan Workers Party (PKK) and Islamic State (IS) jihadists, the DHKP-C is one of the groups targeted in the government's "war on terror" which has seen hundreds of arrests.