The only arrondissement of the Rhône department is the Arrondissement of Villefranche-sur-Saône, (subprefecture: Villefranche-sur-Saône) with 226 communes.
Before the Metropolis of Lyon was separated from the Rhône department in 2015, the arrondissement of Lyon also formed part of it. The part of the pre-2015 arrondissement of Lyon that did not join the new Metropolis of Lyon (101 communes) joined the arrondissement of Villefranche-sur-Saône.
References
Arrondissements of the Rhône department Wikipedia(Text) CC BY-SA