Former councillor Bryan Scott (Dunedin) vacated his seat when he resigned in October.
And among sitting councillors, Cr Alexa Forbes (Dunstan) announced she would not seek re-election in February.
Cr Michael Laws (Dunstan) said this week he remained undecided.
And although Cr Elliot Weir (Dunedin) said they had not made a formal decision or announcement, "I will be standing again".
"It has been a privilege to serve my community and there’s always more mahi to be done."
Cr Alan Somerville (Dunedin), who ran as a Green Ōtepoti candidate in the last election, said he would stand again.
But when asked whether he would stand as a Green again this year, he said: "Further information to come on that in a few days."
Cr Andrew Noone (Dunedin) said he would stand again, and progressing Otago’s land and water plan and public transport were two areas of interest.
It was a privilege to represent ratepayers, Cr Lloyd McCall (Molyneux) said, adding he looked forward to "continuing to build on the gains that have been made this triennium".
Cr Gretchen Robertson (Dunedin), who served as chairwoman this triennium, said she would stand as an independent.
Cr Kate Wilson (Molyneux) said she would stand again and was "keen to empower community more through more open and transparent processes".
With the draft land and water plan delayed until next term, Cr Gary Kelliher (Dunstan) said he would stand again.
"And also because I am one of few councillors prepared to vote no to continual unreasonable rates increases."
Cr Kevin Malcolm (Moeraki) announced he would stand last week.
Cr Tim Mepham (Dunedin) said he still had "plenty to offer" and would stand again.
In a statement last week, Otago Regional Council chief executive Richard Saunders encouraged people to start thinking now about standing in this year’s local government election or consider nominating someone else.
"To be effective you will need to bring a broad range of skills to the role including decision-making and strategic thinking, communication skills and the desire to engage with your community as part of your role, plus relationship-building and collaboration skills," Mr Saunders said. — APL
