Born in New Boston, New Hampshire, Wason attended public and private schools and Francestown Academy.

He was graduated from the New Hampshire College of Agriculture and the Mechanic Arts at Hanover in 1886 and from Boston University School of Law in 1890.

He served as president of the Citizens' Guaranty Savings Bank of Nashua, 1904–1941, and he also engaged in agricultural pursuits in Merrimack from 1906 to 1941.

He retired from public life in 1933 and resided on his estate near New Boston, where he died February 6, 1941.

This article incorporates public domain material from the Biographical Directory of the United States Congress