Janis Medinš (October 9, 1890 — March 4, 1966) was a Latvian composer.
He was born in Riga.
He was a vital force in musical life during the short-lived first independent Latvian republic (1918—40).
He almost singlehandly established in his country both the balletic genre – with Milas uzvara (‘Love's Victory’, 1934) – and the operatic with Uguns un nakts (‘Fire and Night’, 1913—19) and Dievi un cilveki (‘Gods and Men’, 1921).
It was as a result of multiple invasions of his country that Medinš left Latvia in 1944, eventually settling for good in Sweden.