1965–66 Divizia B

The 1965–66 Divizia B was the 26th season of the second tier of the Romanian football league system.

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

To Divizia B
Promoted from Divizia C
 * Ceahlăul Piatra Neamț
 * Dinamo Victoria București
 * CFR Arad
 * Arieșul Turda

Relegated from Divizia A
 * Minerul Baia Mare
 * Progresul București

From Divizia B
Relegated to Divizia C
 * Tractorul Brașov
 * Sătmăreana Satu Mare
 * Chimia Făgăraș
 * CFR Timișoara

Promoted to Divizia A
 * Siderurgistul Galați
 * Știința Timișoara

Renamed teams
Constructorul Brăila was renamed as Progresul Brăila.

Metalul București was renamed as Metalurgistul București.

Unirea Râmnicu Vâlcea was renamed as Oltul Râmnicu Vâlcea.

Other teams
Știința Galați gave away its place in the Divizia B to newly founded Oțelul Galați.