It beat The Wrong Mans, Uncle and Inside No. 9 to the title.
The programme features the fictional Adam Smallbone, an Anglican vicar who leaves a rural parish in Suffolk to join a church in Hackney, East London.
He encounters a mixture of true believers and people who only go to the church to get their children into a good school, as well as drug addiction and homelessness.
Church of England vicar Richard Coles, who's also known as the musician in the band The Communards, advised producers as they were making Rev. He's said to be the inspiration for the character of Adam Smallbone.
Tom Hollander, who plays Mr Smallbone, said: "[w]e wanted to define ourselves in opposition to the cliché of a country vicar, partly because we wanted to depict England as it is now, rather than having a sort of bucolic-y, over the hills and far away, bird-tweeting England.
"We wanted the complications of the multi-cultural, multi-ethnic inner-city, where everything is much harder."
The programme debuted on BBC 2 in 2010, and aired its third and final series this year.