Armon Wellington Irwin was born in 1868 in London, Ontario. In 1892, he married Margaret Jane Armstrong of Wiarton, Ontario. They came to Moose Jaw on March 5, 1904 as an agent for Sun Life, however, soon after his arrival he established his own insurance and real estate business. In 1912, when the Walter Scott Block opened, Irwin was the first occupant of the business section of the block. He operated his insurance and real estate business until April 15, 1943, when he sold it to I. C. Sutton. Irwin was an active member of the Moose Jaw community. He was a member of the Moose Jaw School Board and of the Saskatchewan Conference of the United Church.
In 1911, he built a large home at 29 Stadacona St. West (known as 155 Stadacona St. West after 1914) and lived there until around 1950. Armon and Margaret had four children: Marguerite, Annie, Armon F., and Frank. C. Margaret died in 1951. Irwin then married Emma Lydiard of Moose Jaw. He died October 19, 1958 in Victoria.