After 23 years on the job, Alta Vista Ward Councillor Peter Hume will not be seeking re-election.
Hume took his name off the list of candidates on Friday and released a statement to his constituents.
He said that he allowed work to dominate his life and was looking for better balance.
Hume also said that with the increase in the use of social media, councillors are expected to be available 24 hours a day, seven days a week and he finds that unacceptable.
Ottawa Mayor Jim Watson thanked Hume for his more than two decades of service in a Tweet on Friday that read:
"Thank you Peter Hume for 23 years of service!! Surprised and a big loss for the City that you are not seeking re-election."
Watson and Hume were both elected as rookie councillors in 1991.