Although the society celebrates 100 years of existence, the Royal Show was its 98th and not its 100th show, because of three years of recess during World War 2.
Society president John Herbert, of Heriot, said he was glad the weather had turned out beautifully, drawing a crowd of more than 2500.
"It's been absolutely brilliant. We had over 1000 entries and we've had people from all over the place - one man even came from Hamilton for the show."
Part of holding a Royal Show meant three sections were selected to give royal awards - equestrian, beef cattle and sheep.
Mr Herbert thanked the time and effort the show committee had put into the events. He also made special mention of the Jenkins.
Peter Jenkins and his wife, Waveney, travelled from the Isle of Man to celebrate 100 years of the society. Mr Jenkins is the grandson of Mr Herbert's great-great uncle James Laidlaw (JL) Herbert.
JL was only 24 when he became president of the society with its first show in Kelso, West Otago in 1911. His life was cut short in 1916 during World War 1, but his widow, Gladys, remained a solid contributor to the society. She showed stock at the West Otago A and P Show, securing the most points in the sheep, cattle, and draught horse sections, winning the Todd Bros and Co Cup, and later the Brooksdale Romney Marsh Cup for the best-presented Romney sheep.
Mr Jenkins said it was "fantastic" to be a part of the 100-year celebrations.
Tractor dancing, magic shows and demonstrations by police dogs ran throughout the day, but the major drawcard was the Topp Twins' appearance.
Kiwi comedy duo Jools and Lynda Topp performed as their alter-egos, Ken Moller and Ken Smythe, and sang several of their own songs.
Lynda Topp said the pair had a great time at the show.
"West Otago was a fantastic, very responsive audience. It was a brilliant day."
Topp said she enjoyed visiting the stalls, sideshows and animals and even managed to hand out ribbons to the winners of several categories and judged the champion Hereford cattle.
