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.
How to pick a Chief Minister
MNH working on 'interim solution' for online newspaper archive
Applications for Child Benefit move online
Woman takes on marathon challenge after endometriosis battle