Joniskis is a locality located 202.75 km south-southeast from Vilnius in Siauliai County, Lithuania. The population of Joniskis is 8,746 people. Birzai, Kursenai, Mazeikiai are located close to Joniskis. You can find Joniskis on any map using the following decimal coordinates: 56.2434 (latitude), 23.6179 (longitude).