Johannishus is a locality situated in Ronneby Municipality, Blekinge County, Sweden with 748 inhabitants in 2010.

[1] Johannishus castle is situated some kilometers north of locality.

There exist a school for 150 pupils and a library.

The club is recording and publishing information on the history of the localities Hjortsberga, Johannishus, Edestad, Förkärla and Listerby.

This article about a location in Blekinge County, Sweden is a stub.