There is a Church of Scotland Parish Church in Kilmelford, part of the Netherlorn Church website . Regular Sunday services alternate between Kilmelford and Craignish. The church in Kilninver is now owned by the local estate, but with their kind permission occasional weddings, baptisms and communion services are held there. Details of upcoming services can be found on the local events page.
There are further Church of Scotland services held at Kilbrandon (Islo of Seil) and Kilchattan (Luing) - details of all those times and locations can be found on the Netherlorn Church page above.
Other Christian denominations have churches in Oban, Lochgilphead or both.