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A code of conduct for all South Australian MPs is inevitable after a damning report found sexual harassment, discrimination and bullying are rife in the parliament, Premier Steven Marshall says.

The premier and his ministers are already covered by such rules, but they don’t extend to backbench MPs.

Mr Marshall says taking that step is up to the parliament, but the government will seek to establish a committee to respond to the issues raised in the recent report from Acting Equal Opportunity Commissioner Emily Strickland.

“I’m covered by a ministerial code of conduct, the cabinet is covered by a ministerial code of conduct,” he told reporters on Tuesday.

“What the parliament needs to do is decide whether all MPs are covered.

“I think it’s an inevitability. There is a community expectation that this be put in place.”

In her report, Ms Strickland found that 27 per cent of respondents among the parliamentary workforce reported being sexually harassed.

She said allegations of harassment ranged in seriousness and included sexually suggestive and unwelcome comments, indecent exposure and physical assault with MPs and their staff among the alleged perpetrators.

Ms Strickland also found many people experienced offensive comments and jokes and disrespectful remarks based on race, age and sexist attitudes.

The investigation revealed many incidents were part of a pattern of behaviour that had been ongoing for more than 12 months.

It found the majority of people were unlikely to report incidents, with many fearing repercussions for their careers.