Linn Township is a township in Dallas County, Iowa, USA.

Linn Township covers an area of 36.18 square miles (93.7 km2) and contains one incorporated settlement, Linden.

According to the USGS, it contains three cemeteries: East Linn, Harper and West Linn.

The Middle Raccoon River and the streams of Cass Creek and Mosquito Creek run through this township.

This article about the geography of Dallas County, Iowa is a stub.