A popular attraction of the show, the championships were last held in 2020 before the COVID-19 pandemic set in.
Hill claimed the Ernie Beehag Best Local Shearer in that year after winning in both the senior and intermediate competitions.
He also made the podium twice this year, winning the senior competition again and placing second in the open.
Even with a second placing, he earned enough points to claim the memorial trophy for 2023.
The Riverina Shearing Championships were held on the Saturday of the show, and incorporated a wool handling competition.
A Riverina Pro Quick Shear was held on the Friday night.
Riverina Pro Quick Shear results:
Open - Boogie Ferguson, 1; Jai Hayward, 2; Bailey Crisp, 3; Mick Gowans, 4.
Senior - Mick Gowans, 1; Clint Atkinson, 2; Jake Sullivan, 3.
Intermediate - Jaidyn Druitt, 1; Isaiah Weidner, 2; Jessie Weidner, 3; Mitch Thomas, 4.
Shearing & Wool Handling Competition
Riverina Shearing Championships results:
Ladies Shear - Catalina Micallef, 1; Marnie Ross, 2; Kimberly Buckett, 3.
Open - Jake Sullivan, 1; Mathew Hill, 2; Grant Lundie, 3; Clint Atkinson, 4.
Senior - Mathew Hill, 1; Mick Gowans, 2; Jai Hayward, 3; Reef Wereta, 4.
Intermediate - Jodi Gillett, 1; Steven Taibot, 2; Archie Roberts, 3; Marnie Ross, 4.
Learners - Mitchell Clarke, 1; Zaya Jensen-Solyom, 2; Adam McDiarmid, 3; Lathen Filmer, 4.
Wool handling results:
Novice - Anna Lowe, 1; Zaya Jensen-Solyom, 2; Ngarangi Holscheir, 3; Layla Maguire, 4.
Open - Marlene Whittle, 1; Kirsty Pollock, 2; Millarni Thomson, 3; Loretta Wahangi, 4.