 otter tail township is a township in otter tail county, minnesota, united states. the population was 556 at the 2000 census. ==geography== according to the united states census bureau, the township has a total area of 30.4&nbsp;square miles (78.8&nbsp;kmÂ²), of which 16.4&nbsp;square miles (42.4&nbsp;kmÂ²) of it is land and 14.1&nbsp;square miles (36.4&nbsp;kmÂ²) of it (46.25%) is water. ==demographics== as of the census of 2000, there were 556 people, 241 households, and 187 families residing in the township. the population density was 34.0 people per square mile (13.1/kmÂ²). there were 644 housing units at an average density of 39.4/sq&nbsp;mi (15.2/kmÂ²). the racial makeup of the township 
Townships_in_Minnesota Townships_in_Otter_Tail_County,_Minnesota