The theatre association is named "Teatersmedjan" and draws members from all ages, although the youth dominates. They have rehearsal and venues in a converted locomotive workshop called "Lokstallarna". This is also the venue for young musical bands. There are several vocal choirs. The most notable secular choirs are "Karlshamn Chamber Choir" and "ABF-kören". The parishes also have choirs. Classical music is performed by "Karlshamns musiksällskap". "Karlshamns musikkår" is a concert band of wind instruments marching through the city center regularly during the summer season. The jazz association "Munthe" invites musicians to play on restaurant "Gourmet Grön". A musical outdoor fair "Östersjöfestivalen" is held in the town centre the third week of July each summer. There is a municipal music school.
"Karlshamns Allehanda" is the name of the daily newspaper founded in the 19th century and since 2003 merged with the regional daily "Blekinge Läns Tidning", owned by "Gota media". The second newspaper covering the region is "Sydöstran". Radio and television has local agencies in the county main town Karlskrona.
Karlshamn is the port where Karl Oskar and Kristina Nilsson and their family departed for America in 1850 in the well-known historical novel The Emigrants by Vilhelm Moberg