State TV's website said today that the verdicts can be appealed.
The four were arrested in November as part of ongoing crackdown by hardliners, a move that was criticised by moderate President Hassan Rouhani. Several Iranian activists and cultural figures were also arrested in the run-up to the February elections for Parliament and the all-cleric Assembly of Experts.
The four sentenced have worked for various newspapers, including pro-reform Farhikhtegan daily.
They include Davood Asadi, who was sentenced to 10 years in prison. Ehsun Mazandarani was given a seven-year term while Afarin Chitsaz and Ehsan Safarzaiee each have to spend five years behind bars.
