Plavša families are mainly Croats and they are mostly from Vinkovci area , often Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Knin and Split.
Prevalence
About 100 people with faimily name Plavša live in Croatia today, in 50 households. There were 160 of them in the middle of the past century, and their number decreased by 40 percent. They are located in 9 Croatian counties, in 12 cities and 7 other places, mostly in Golubic (20), Sinj (15), Split (10), Otok in Sinj area (10), and in Rijeka (<10).
Outside Croatia
Family name Plavša is present in two countries on two continents. The family name "Plavsa " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.