Congregation Knesseth Israel, also known as the Ellington Shul, is a Modern Orthodox synagogue located at 236 Pinney Street in Ellington, Connecticut. The congregation was founded in 1906 by a group of Yiddish-speaking Jewish farmers from Russia and Eastern Europe. Its building, dating to 1913, is a rare example of an early 20th-century rural synagogue in the state, and was listed on the National Register of Historic Places in 1995.