Gwynedd has become the first local authority to declare its support for Welsh independence.
Councillors backed a motion, with an overwhelming majority in favour of Wales becoming a sovereign nation.
But a Liberal Democrat member, who opposes independence said the move would be a "disaster".
The council's decision comes after at least 17 community councils backed similar motions.
Plaid Cymru councillor Nia Jeffreys put forward the largely symbolic motion at a meeting in Caernarfon today.
She said: "We're facing a hard Brexit and are used to Westminster playing silly games while ignoring Wales.
"They (the Government) are putting their own party's unity ahead of our economy. It would be easy to fall into a pool of despair but there is hope, there is a mood for change."