|Elevation||850 ft (260 m)|
|GNIS feature ID||445403|
Walnut was originally called Fredericksburg, and under the latter name was laid out and platted in 1866. When the railroad was built through the settlement in 1868, it was renamed Walnut, after Walnut Township. A post office was established as Walnut in 1869, and remained in operation until it was discontinued in 1906.
Walnut is located at.
- "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- McDonald, Daniel (1908). A Twentieth Century History of Marshall County, Indiana, Volume 1. Lewis Publishing Company. p. 129.
- "Marshall County". Jim Forte Postal History. Retrieved 18 January 2015.
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