Mr Sampson beat Narelle Whitham by 94 votes for the one vacant councillor position which was created by the unexpected death of Cr Peter Connell last month.
Cr Connell’s replacement on council was decided on the distribution of preferences from the December local government elections, at which both Mr Sampson and Ms Whitham were unsuccessful.
Mr Sampson polled an extra seven first preference votes in the countback than he did in the initial election for this set of councillors, to finish with 145 first preferences.
Ms Whitham was the first eliminated from the initial race, polling 47 first preference votes.
She added another four preferences to finish with 51 first preferences in the Tuesday, May 17, countback election.
Mr Sampson is a Deniliquin business owner, and said he chose to be involved in the by-election to ensure there is some “youth” on council.
“My interest is in getting younger people on board with council,” he said.
“A bit of youth and longer term vision would be beneficial.”
Speaking when the countback election was announced, the 35-year-old said his reasons for nominating in December also still stand, with a greater voice for the surrounding villages one of his primary goals.
He also wants to see an improvement of rural roads and, as an electrician, would like to see more of a priority on using local tradies and suppliers.
Mr Sampson is yet to be sworn in, with a ceremony to do so still to come before he takes up his position.
He will join eight other councillors already on council.