Heron is a census-designated place in Sanders County, Montana. The population was 149 at the 2000 census.Heron is located at 48°3′27″N 115°57′37″W / 48.05750°N 115.96028°W / 48.05750; -115.96028.According to the United States Census Bureau, the CDP has a total area of 3.4 square miles, all land.As of the census of 2000, there were 149 people, 58 households, and 41 families residing in the CDP. The population density was 43.9 people per square mile. There were 63 housing units at an average density of 18.6 per square mile. The racial makeup of the CDP was 94.63% White, 3.36% Native American, 0.67% Asian, and 1.34% from two or more races.There were 58 households out of which 32.8% had children under the age of 18 living with them, 67.2% were married couples living together, 3.4% had a female householder with no husband present, and 29.3% were non-families. 29.3% of all households were made up of individuals and 12.1% had someone living alone who was 65 years of age or older.