[3] Rainsburg takes its name from Conrad Rain, its first inhabitant who lived in a round log building and arrived some time before 1786, when he was joined by Captain Jacob Adams and his wife Loretta Dustimer.

[4] Also among the first settlers in Rainsburg was James Donahoe, who arrived sometime before 1800 and operated a tannery, store, and hotel.

By 1825, there were approximately a dozen houses in Rainsburg, which continued to grow to obtain borough status in 1856.

However, as most of its students came from the South and national tensions soared in advance of the Civil War, the school encountered serious retention problems.

[5] In 1875, the community school moved into the seminary building, which later housed the Independent Order of Odd Fellows Lodge #730.

The interior features a broad central solid oak staircase, which reaches to the small octagonal louvered belfry.

[6] In addition to the seminary, Rainsburg features a high number of churches for its population size.

[7] Throughout its history, Rainsburg has been home to several churches, stores, hotel, carriage manufactory, tannery, grist mill, and over 50 private residences.

Rainsburg's original post office counter and mailboxes, previously located in the former Shipley Store, can be viewed today at the General Store & Post Office of the Bedford Village Archeological Site in nearby Bedford.

According to the United States Census Bureau, Rainsburg has a total area of 0.16 square miles (0.42 km2), all land.