Grinkiškis (Polish: Grynkiszki, Yiddish: גרינקישאָק, Grinkishok) is a town in the Radviliškis District Municipality in Šiauliai County, Lithuania.

Krzysztof Gatavičius, thankful for his military achievements, built a church in 1618.

The coat of arms depict a golden angel on one knee, who holds a silver lily with three blooms.

The angel was borrowed from one of the two surviving crosses in town's cemetery, made by 19th-century dievdirbys Vincas Svirskis.

[3] The lily, a symbol of purity and innocence, represents Blessed Virgin Mary – patron of the town and namesake of its church.