Ms Bower handed in her resignation on Monday, meaning a councillor code of conduct complaint against her - relating to her "seeking of legal advice over an internal matter" - will be discontinued, according to mayor Wayne Johnston.

She was one of two Meander Valley councillors to run for the Liberal Party in Lyons at the recent state election, but said she remained a councillor during that period due to the shortness of the campaign.

Residents who live close to the proposed prison site, along with segments of the Westbury community, have been highly critical of the state government's plans, including criticism of Meander Valley Council's involvement in attracting the proposal to the area.

When asked what she thought of the location proposed for the prison given she is no longer a councillor, Ms Bower would not be drawn.

"I can't comment on that one. I'll keep my powder dry on that one," she said.

"I think things need to happen in that space to get an idea of where everything sits. Nothing has been presented to council yet, there's nothing to actually view from a planning aspect.

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"I think all of that needs to play out, due diligence needs to be done."

But during the state campaign, Ms Bower confirmed on her candidate Facebook page that she supported the Northern Regional Prison being constructed on Birralee Road, in response to a question.

Labor holds the seat of Lyons on a margin of 5.18 per cent after incumbent MHR Brian Mitchell gained a 1.35 per cent swing. It was a challenging campaign for the Liberals after candidate Jessica Whelan resigned due to anti-Islamic social media posts, but remained on the ballot.

Ms Bower said the 2019 campaign was "not ideal" for the party, but she planned to focus on agriculture, tourism, fishing and the COVID recovery for the vast Lyons electorate made up of small towns from Port Arthur to Sheffield, and up the East Coast.

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"It's not like Bass or Braddon where there's a major city," she said.

"From my perspective, the longer the campaign is, the better. I want to be able to get around to those towns and find out those issues.

"I'm very grassroots and I think that's where my local government experience will really help me in this role. I can take that grassroots level and also bring it up to the strategic vision level as well."

Ms Bower will remain chief executive officer of the Bell Bay Advanced Manufacturing Zone.