1965–66 Divizia C

The 1965–66 Divizia C was the 10th season of Liga III, the third tier of the Romanian football league system.

The format has been maintained to four series, each of them having 14 teams. At the end of the season the winners of the series promoted to Divizia B and the last two places from each series relegated to Regional Championship.

To Divizia C
Relegated from Divizia B
 * Tractorul Brașov
 * Sătmăreana Satu Mare
 * Chimia Făgăraș
 * CFR Timișoara

Promoted from Regional Championship
 * Minobrad Vatra Dornei
 * IMU Medgidia
 * Unirea Negrești
 * CFR Caransebeș
 * Șantierul Naval Oltenița
 * Progresul Reghin
 * Progresul Strehaia
 * Metalul Copșa Micǎ

From Divizia C
Promoted to Divizia B Relegated to Regional Championship
 * Ceahlăul Piatra Neamț
 * Dinamo Victoria București
 * CFR Arad
 * Arieșul Turda
 * Textila Botoșani
 * Rulmentul Bârlad
 * Unirea Răcari
 * Progresul Alexandria
 * Teba Arad
 * Metalul Pitești
 * Topitorul Baia Mare
 * Unirea Târgu Mureș

Renamed teams
Victoria Piatra Neamț was moved from Piatra Neamț to Roman and renamed as Victoria Roman.

Dinamo Moldova Iași was renamed as Locomotiva Iași.

Viitorul Suceava was renamed as Chimia Suceava.

Textila Sfântu Gheorghe was renamed as Oltul Sfântu Gheorghe.

Victoria Giurgiu was renamed as Dunărea Giurgiu.

Tractorul Corabia was renamed as Progresul Corabia.

Pandurii Târgu Jiu was renamed as Victoria Târgu Jiu.

Foresta Sighetu Marmației was renamed as Forestiera Sighetu Marmației.