As well as the General Election, there will be also be elections for all the district and unitary authorities in Devon as well as a mayoral election in Torbay.
People can vote from 07:00 until 22:00 BST, with most of the results expected to be announced overnight.
You can follow the results as they come in on our election live service.
Voting is under way at polling stations across 12 Devon constituencies in the 2015 General Election.