Blue River is an unincorporated community in Polk Township, Washington County, in the U.S. state of Indiana.

[1] A post office was established at Blue River in 1873, and remained in operation until it was discontinued in 1904.

[2] Blue River is located at 38°31′48″N 85°56′22″W / 38.53000°N 85.93944°W / 38.53000; -85.93944.

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