1882Government
The community was founded in 1882 and was characterized by the purported healing powers of the spring water feeding Sager Creek and trading with nearby Native American tribes.
1899History
The lowest temperature recorded was −24 °F (−31.1 °C), on February 12, 1899.
1954History
The city's highest temperature was 111 °F (43.9 °C), recorded on July 14, 1954.
1992History
The phosphorus load of the Illinois has been subject of controversy in the area, even reaching the United States Supreme Court in 1992.
2000History
=== 2000 census ===
At the 2000 census, there were 2,647 families residing in the city.
2009History
As of 2009, there were 52 churches that called Siloam Springs home by address.
2011History
As a result of the applicable strict phosphorus effluent regulations, SSWWTP upgraded its system in 2011.
2012History
In 2012, the city was named one of the 20 best small towns in America by Smithsonian magazine.
2020History
== Demographics ==
=== 2020 census ===
As per the 2020 United States census, there were 17,287 people, 5,382 households, and 3,980 families residing in the city.