Arwid Hall and James Allanson will join the two boards respectively
Douglas Council and Jurby Commissioners will not be holding by-elections as only one person in each area has come forward.
In the capital, where a single seat was vacant, Arwid Hall will become the new representative in Central Ward, joining Mark Wheeler and Natalie Byron-Teare.
Meanwhile, James Allanson has joined the board in Jurby, but one seat there still remains unfilled.
He joins Darren Hope, Yasmin Cowell and Phillip Corkill who were elected in April.
Ramsey Commissioners to have contested election to fill one seat
Three people step forward for by-election in Port Erin
Health minister to seek £15.3million to cover 2024-25 overspend
Step forward for ADHD and Autism pathways on Island?
Dusty the cat is feline fine, found in Devon