Silverdale Township is a township in Cowley County, Kansas, United States. As of the 2020 census, its population was 329.
Silverdale Township covers an area of and contains no incorporated settlements. The streams of Grouse Creek, Otter Creek and Silver Creek run through this township.
The township contains the unincorporated community of Silverdale.
According to the USGS, it contains two cemeteries: Liberty and Silverdale.