Schönenberg an der Thur is a village and former municipality in the canton of Thurgau, Switzerland.
In 1996 the municipality was merged with the other, neighboring municipalities Buhwil, Kradolf and Neukirch an der Thur to form a new and larger municipality Kradolf-Schönenberg.
Schönenberg an der Thur is first mentioned in 883 as Thuruftisthorf. In 1359 it was mentioned as Schönnenberg.[1]
The population in 1831 was 190 people and by 1870 it had increased to 254. Around the turn of the century, the population increased sharply, so that in 1910 there were 820 people. The population in 1960 was 813 and in 1995 it had increased to 1,249.[1]