The Campeonato Rondoniense is the football league of the state of Rondônia, Brazil. Between 1945 and 1990, the league was an amateur competition. The professional league started in 1991.
First Division
First stage: double round-robin, in which all teams play each other home-and-away games.Second stage: home-and-away playoffs with the top 4 teams of the first stage.The winner of the second stage is crowned the champion.
The team last placed in the first stage is relegated to the second division.
As in any other Brazilian soccer championship, the format can change every year.
First Division
Sport Club Ulbra Ji-ParanáVilhena Esporte Clube (Vec)Ji-Paraná Futebol ClubeSociedade Esportiva União CacoalenseSport Club Genus de Porto VelhoClube Atlético PimentenseSport Clube ShallonSecond Division
Cruzeiro Esporte ClubeSociedade Esportiva AriquemesClube Recreativo Esportivo JaruenseArmazém Morumbi Futebol ClubeMoto Esporte ClubeRolim de Moura Esporte ClubeFerroviário (RO) 17 timesFlamengo (RO) and Moto Clube 10 timesYpiranga 5 timesBotafogo (RO), São Domingos and Vilhena 1 timeJi-Paraná 9 timesUlbra Ji-Paraná 3 timesVilhena 4 timesAriquemes', União Cacoalense, ' 3 timesGuajará, CFA, Espigão, Genus and Rondoniense 1 timeFerroviário (RO) 17 timesFlamengo (RO) and Moto Clube 10 timesJi-Paraná 9 timesYpiranga and Vilhena 5 timesUlbra Ji-Paraná 4 timesAriquemes and União Cacoalense 2 timesCFA, Botafogo (RO), Guajará, São Domingos, Espigão and Genus 1 time