Circuit rider is a popular term referring to clergy in the earliest years of the United States who were assigned to travel around specific geographic territories to minister to settlers and organize congregations. Circuit riders were clergy in the Methodist Episcopal Church and related denominations.
In sparsely populated areas of the United States it always has been common for clergy in many denominations to serve more than one congregation at a time, a form of church organization sometimes called a "preaching circuit". In the contemporary United Methodist Church, a minister serving more than one church has a "(number of churches) point charge". However, in the rough frontier days of the early United States, the pattern of organization in the Methodist Episcopal denomination and its successors worked especially well in the service of rural villages and unorganized settlements. In the Methodist denominations, congregations do not "call" (or employ) a pastor of their own choice. Instead, a bishop "appoints" (assigns) a pastor to a congregation or a group of congregations, and until late in the 20th century, neither pastor nor congregation had any say in the appointment. This meant that in the early days of the United States, as the population developed, Methodist clergy could be appointed to circuits wherever people were settling.
A "circuit" (nowadays referred to as a charge) was a geographic area that encompassed two or more local churches. Pastors met each year at "Annual Conference" where their bishops would appoint them either to a new circuit or to remain at the same one. Most often they were moved to another appointment every year. (In 1804, the Methodist Episcopal General Conference decreed that no pastor was to serve the same appointment for more than two consecutive years.) Once a pastor was assigned a circuit, it was his responsibility to conduct worship and visit members of each church in his charge on a regular basis in addition to possibly establishing new churches. He was supervised by a Presiding Elder (now called a District Superintendent) who would visit each charge four times a year (the "Quarterly Conference").
Because of the distance between churches, these preachers would ride on horseback. They were popularly called circuit riders or saddlebag preachers. These frontier clergy were never officially called "circuit riders", but the name was appropriate and it "stuck". Officially they were called "traveling" clergy (a term that is still used in Methodist denominations). They traveled with few possessions, carrying only what could fit in their saddlebags. They traveled through wilderness and villages, they preached every day at any place available (peoples' cabins, courthouses, fields, meeting houses, later even basements and street corners). Unlike clergy in urban areas, Methodist circuit riders were always on the move. Many circuits were so large that it would take 5 to 6 weeks to cover them. The ministerial activity of the circuit riders boosted Methodism into the largest Protestant denomination at the time. In 1784, there were 14,986 members and 83 traveling preachers. By 1839, the denomination had grown to 749,216 members served by 3,557 traveling preachers and 5,856 local preachers.