Egypt fell 39 places, from 127 to 166, in the 2011/12 Reporters Without Borders (RSF) global index of press freedom, published on 25 January.
"The Supreme Council of the Armed Forces, in power since February, dashed the hopes of democrats by continuing the Mubarak dictatorship’s practices", RSF said on its official website.
RSF added that journalists in Egypt suffered three periods of exceptional violence in February, November and December.
The year of multiple uprisings against autocratic rulers in the Arab world saw press freedom suffer in many countries in the region.
Syria, Bahrain and Yemen received their worst ever press freedom ranking.
However, Tunisia rose 30 places to 134, although RSF said the country "has not yet fully accepted a free and independent press."