A Queensland watchdog investigating alleged misconduct in the local government sector launched 460 investigations in its first year of operation.

The Office of the Independent Assessor was established in December 2018 as part of the state government's local government reforms, to investigate all complaints about councillors' conduct.

Some councils will need to improve their practices after the March election, independent assessor Kathleen Florian says. Credit:Andrew Meares

Only Brisbane City Council is not under the OIA's jurisdiction, but that will change after the March 28 election.

Independent assessor Kathleen Florian said almost 300 investigations had been finalised, with 124 still underway. Twenty-seven investigations were on hold awaiting the outcome of criminal charges, while 28 others were on hold.