The city is the home of St. Gregory's Abbey, a Benedictine monastery of the Episcopal Church, which was established in 1946.

The 49093 Three Rivers zip code population as of 2010 stands at just shy of 20,000 people 3,048 households, and 1,862 families residing in the city.

There were 3,519 housing units at an average density of 651.7 per square mile (251.6/km2).

32.5% of all households were made up of individuals, and 12.5% had someone living alone who was 65 years of age or older.

[13] Since 1965 the summer school of the Latvian Cultural Center Gaŗezers works in Three Rivers.