By 1900 the town had a number of shingle and lumber mills, a gristmill, a textile mill and a vegetable canning plant. A number of fires and other factors led to a decline in manufacturing, and by 1996 there were no large manufacturing industries left in town. Agriculture also was a large part of life in the 1900s. Main crops included potatoes, corn, peas, and beans. The canning plant in town gave farmers a local market, but today few farms are left.
Potatoes are still a major crop, however, and there remain several dairy farms.
In 1916 there were 11 schools. Today Corinna Elementary School and Corinna Junior High School enjoy support from the community, including a small but active PTF group that coordinates special events and fund-raisers. Members of this group and other residents helped to purchase and build the school playground. Corinna is serious about sports. The Corinna Recreation Department sponsors teams for school-age children.