Only a few people with faimily name Pleška live in Croatia today, in two households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only one small Croatian place, in Baranjsko Petrovo Selo in Beli Manastir area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.