In a fourth district, Bill Toews was elected for the first time as a director. Appointments take effect on Friday.
"These results demonstrate that western Canadian farmers continued to support the single-desk system of marketing, recognising the clout this gives them in a global marketplace increasingly dominated by large multinationals," said Ritter, who is chairman of the Canadian Wheat Board.
Some Canadian farmers have criticised the monopoly on marketing wheat and barley from Western Canada to millers, maltsters and export markets and it is a frequent source of irritation for the United States, which has contested the board's practices 10 times since 1989.
The results, released late on Wednesday, had been delayed after a disgruntled candidate and opponent of the wheat board's monopoly asked a Canadian court to stop votes from being counted because of problems with the voters' list.
A Federal Court judge ruled last week that the count could proceed but that a judicial review of the election can take place after all sides have had a chance to make their cases.
Farmers in Western Canada elect 10 of 15 of the Canadian Wheat Board members. Mail-in ballots in the election for four of those members were supposed to be counted on December 11.