By-Election Location
By winning party colour
Voting Breakdown
Percentage based
Gains and Losses
Percentage based
Plaid Cymru 315 [71.9%; -5.5%]
Llais Gwynedd 123 [28.1%; +5.5%]
Majority: 192
Turnout unknown
Plaid Cymru hold
Percentage change is since May 2012