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.
Michelle Haywood MHK steps down as DOI minister
Chris Thomas appointed Treasury Minister
Alex Allinson steps down
Alfred Cannan commences cabinet reshuffle
Parent group shares concerns over reports of 'AI misuse'