Judge Safiullah Mojadedi on Tuesday found them guilty of dereliction of duty. Another eight were released for lack of evidence.
A total of 19 policemen were among 49 people charged over the death of 27-year-old Farkhunda, who was brutally beaten to death at a Kabul shrine on March 19 after being falsely accused of burning a Quran.
The attack shocked Afghanistan and reverberated around the world, highlighting the brutality women face in the country's conservative society.
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Home/World News/Afghan Woman's Lynching: 11 Policemen Get Year In Jail