Princeton Township is a township in Scott County, Iowa, USA.

Princeton Township covers an area of 32.93 square miles (85.3 km2) and contains one incorporated settlement, Princeton.

According to the USGS, it contains five cemeteries: Fessler, Nowlin, Oak Ridge, Princeton City and Salem.

The streams of Bud Creek, Cordova Slough, Old Channel Lost Creek, South Fork Lost Creek, Wapsipinicon River and Whiskey Run Creek run through this township.

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