A total of 333 blank voting papers for the mayoralty and 123 for the council were received this year.
Helen Craig was the most popular council candidate, securing 9308 votes, with Kate Joblin the next with 8811.
Fallen will be joined by fellow first-termers Charlotte Melser (7171 votes), Michael Law (7457), Peter Oskam (6498) and Glenda Brown (7046).
Oskam was previously the chairman of the Whanganui Rural Community Board.
A byelection to fill his seat on the board will be held after the triennial elections have been finalised.
Elections were not required for the Kai Iwi Community Subdivision and the Kaitoke Community Subdivision.
The turnout for Whanganui finished at 46.44 per cent or 15,611 votes.
In the 2019 elections, 44.17 per cent of all eligible votes were returned.