Swan Lake Township is one of twelve townships in Emmet County, Iowa, USA.

As of the 2000 census, its population was 177.

[1] According to the United States Census Bureau, Swan Lake Township covers an area of 36.46 square miles (94.42 square kilometers); of this, 35.64 square miles (92.32 square kilometers, 97.78 percent) is land and 0.81 square miles (2.1 square kilometers, 2.22 percent) is water.

(This list is based on USGS data and may include former settlements.)

The township contains Swan lake Cemetery.