Roger Ingemar Ljung (born 8 January 1966) is a Swedish former professional footballer who played as a left back. He played for clubs in Sweden, Switzerland, Austria, Turkey, and Germany during a career that spanned between 1983 and 1995. He won 59 caps for the Sweden national team, and represented his country at the 1990 FIFA World Cup, UEFA Euro 1992, as well as the 1994 FIFA World Cup where Sweden finished third.