Suonenjoki

Suonenjoki is thought to have served as a milestone in the Treaty of Nöteborg in 1323. In the 16th and 17th centuries, more and more people began to settle in the area, and in the 18th century, a preacher room was established in Suonenjoki, then a chapel. In the current agglomeration, bridges over the river of Suonenjoki were built early, Kruunusilta (literally means "Crowns Bridge") already existed in 1780, and Siioninsilta (means "Zion Bridge") at the beginning of the river was replaced by a bridge in the 1830s.

When Suonenjoki gained municipal rights in 1865, the population was about 4,000. In the same year, Suonenjoki Church, the current church in Suonenjoki was completed, replacing the cramped first church built in the late 18th century. A railway station was built on Suonenjoki in connection with the completion of the Savo Railway (also known as Kouvola–Iisalmi railway) in 1889. In the early 20th century, the sawmill industry became the most important industry in the area. Strawberry cultivation became more widespread from the 1940s, and Suonenjoki became known as "the Strawberry Town". The Suonenjoki co-educational school began operations in 1930, moving to its current high school building in 1950.