Mirna may refer to:

Places

• Mirna (Adriatic Sea), a river in Croatia

• Mirna, Iran, a village in Iran

in Slovenia

• Mirna (Sava), a river in Slovenia

• Mirna Valley, a valley in Slovenia

• Mirna, Mirna, Slovenia; the seat of the eponymous municipality

• Municipality of Mirna, a municipality in Slovenia

• Mount Mirna, a hill in Slovenia

People

• Mirna (name), a female name

Other uses

• microRNA, abbreviated as miRNA

• , a United States Navy patrol boat in commission from 1917 to 1918

• (Type 171), a Yugoslav patrol boat class

See also