Tytsjerksteradiel (West Frisian pronunciation: [tiˈtsjɛrkstəraˌdiəl] ⓘ) is a municipality in the province of Friesland in the Netherlands.

Tiete was a daughter of Tryn, after whom the region (Trynwâlden) is named.

The other villages in Trynwâlden are also named after Tryn's children: Oentsjerk (Oene), Gytsjerk (Giete), Readtsjerk (Reade), Aldtsjerk (Âlde), Ryptsjerk (Rype).

A statue of Tryn and her children is placed in Oentsjerk next to the mainroad (Rengerswei).

The administrative centre and largest village in the municipality is Burgum.