South Australian Police Commissioner Grant Stevens has been appointed for another five years, with the state government saying the decision will provide certainty and continuity for the force.

Mr Stevens took over as SA's top cop in 2015 and had his initial appointment extended by three years in 2020.

His new contract will take him through to July 2028.

Premier Peter Malinauskas said South Australians "owe a debt of gratitude" to Mr Stevens.

"Through his long and distinguished policing career, he has always put the safety of South Australians first," Mr Malinauskas said.

As well as leading the force, the commissioner served as state co-ordinator during the 793 days of South Australia's COVID-19 emergency declaration, playing a key role in how the state navigated the pandemic.

Mr Stevens said it was an honour to continue serving the South Australian community.

"South Australia is my home. I was born here and grew up here and I often reflect on how fortunate I am to be able to do what I do each day," he said.

"It's a privilege to lead an organisation made of highly professional, dedicated and motivated employees."