Erin Township is one of sixteen townships in Hancock County, Iowa, USA.

[1] Erin Township was organized in 1879.

[2] It was originally settled chiefly by Irish immigrants, who named it Erin, the poetic form of Ireland.

[3] According to the United States Census Bureau, Erin Township covers an area of 36.37 square miles (94.19 square kilometers).

The township contains Saint Patrick's Cemetery.