In the world, Sirka (Sirka 
) is quite a rare gender-neutral forename. The first name Sirka is habitual in Namibia, where it is quite a rare female name, India, where it is a rare epicene name, and Germany, where it is a very rare feminine name. Measured by absolute frequency, this name is the most popular in India, Namibia, and Indonesia. More prevalently, Sirka is the last name as well as the forename.