Since its organization in 1950, the Castle Singers have travelled the globe and intrigued and delighted audiences with their unique blend of music. Today, the group offers an entertaining program of vocal jazz. Accompanied by a rhythm section, the group specializes in all types of vocal jazz music, from early swing to avant garde. Members of the Castle Singers are chosen by audition and represent many of the college's more than 50 academic majors. Wartburg College is the only Lutheran college with a vocal jazz choir integrated with its curriculum. Click here to view a video about the Castle Singers.

Most recently in 2011, the Castle Singers were invited to perform in Abu Dabi and Dubai in the United Arab Emirates. During the spring of 2005, the Castle Singers provided musical entertainment on a Caribbean Cruise ship and visited Montego Bay, Jamaica; Grand Cayman, and Cozumel, Mexico. The Castle Singers performed in Australia during May Term tours in 2003, 1998, and 1994. In 1990, they spent a month performing and hosting vocal jazz workshops in Rumania, Bulgaria, and Greece. In 1987, they toured the British Isles, including stops in Ireland, Scotland, and England. The group's U.S. tours have included performances at Disney World in Florida and on the Mississippi Queen riverboat. The group has traveled to Greece and the former U.S.S.R. in its earlier history.

The Castle Singers perform at events on and off-campus. The group makes annual one-week concert tours in the United States and regularly travels abroad during the college's one-month May Term.