 The blazon of the municipal coat of arms is "Gules three Fishes Azure nainaint in band on a Bend wavy Argent"

Rheineck has a population (as of ) of ., about 34.7% of the population was made up of foreign nationals.Of the foreign population, (), 49 are from Germany, 318 are from Italy, 460 are from ex-Yugoslavia, 101 are from Austria, 42 are from Turkey, and 111 are from another country.