Calvin Fletcher (February 4, 1798 – May 26, 1866) was an attorney, banker, farmer, landowner, and state legislator from Indianapolis, Indiana, United States. In 1821 Fletcher moved from Vermont to the new settlement of Indianapolis, where he made his financial fortune. In addition to his business interests, Fletcher was involved in Indianapolis's community affairs, especially educational and civic development, and valued education, religious faith, hard work, and community service.
Fletcher's multi-volume diary, published as The Diary of Calvin Fletcher in nine volumes by the Indiana Historical Society between 1972 and 1983 describes a wide range of topics as well as his personal interests, acquaintances, and community activities.
Fletcher was born on February 4, 1798, in Ludlow, Vermont, the eleventh child of Jesse and Lucy Keyes Fletcher's fifteen children. Fletcher’s father, a poor man with a large family to support, still managed to provide his children with a basic education. Young Fletcher attended local schools until the age of sixteen and worked on the family farm. With his father’s permission, Fletcher left home in 1815 at the age of seventeen. Fletcher went to Windsor on the Connecticut River, where he worked on several local farms before moving to Royalton and later to Randolph, Vermont, to attend school and work. Fletcher returned home for a brief time then moved to Westford, Massachusetts, to attend school.
In 1817, after completing his education at Westford, Fletcher once again set out on his own. With no particular destination in mind, Fletcher traveled south through Connecticut to New York City and Philadelphia, then west through Pennsylvania to Wheeling. Fletcher ended up in Urbana, Ohio, in 1817, where he taught school, studied law under James Cooley, and was admitted to the Ohio bar in 1820.