The 1986–87 County Championship was the 45th season of the Liga IV, the fourth tier of the Romanian football league system.
The champions of each county association play against one from a neighboring county in a play-off to gain promotion to Divizia C. Teams promoted to Divizia C without a play-off matches as teams from less represented counties in the third division.
Source:[4] Rules for classification: 1) Points; 2) Goal difference; 3) Number of goals scored.
(C) Champion; (Q) Qualified for the phase indicated The championship final was played on 11 June 1987 at 23 August Stadium in Baia Mare.
Cuprom Baia Mare won the Maramureș County Championship and qualify to promotion play-off in Divizia C.