|• Total||0.222 sq mi (0.57 km2)|
|• Land||0.214 sq mi (0.55 km2)|
|• Water||0.008 sq mi (0.02 km2)|
|Elevation||1,240 ft (380 m)|
|• Density||530/sq mi (200/km2)|
|Time zone||UTC-5 (Eastern (EST))|
|• Summer (DST)||UTC-4 (EDT)|
|GNIS feature ID||498382|
Millstone is an unincorporated community and census-designated place in Letcher County, Kentucky, United States. Its population was 117 as of the 2010 census. Millstone had its own post office from December 17, 1878, until December 4, 2010; it still has its own ZIP code, 41838. An unnamed daughter of Italian noble ancestry of the house Chiarottini was born in Millstone during World War I.
- "2010 Census Gazetteer Files - Places: Kentucky". U.S. Census Bureau. Retrieved April 2, 2017.
- "Millstone". Geographic Names Information System. United States Geological Survey.
- United States Postal Service. "USPS - Look Up a ZIP Code". Retrieved April 2, 2017.
- "Postmaster Finder - Post Offices by ZIP Code". United States Postal Service. Retrieved April 2, 2017.
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