Wyandot Popcorn Museum

Old US Post Office
U.S. National Register of Historic Places
Front of the post office
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Location	169 E. Church St., Marion, Ohio
Coordinates	40°35′13″N 83°7′38″W / 40.58694°N 83.12722°W / 40.58694; -83.12722Coordinates: 40°35′13″N 83°7′38″W / 40.58694°N 83.12722°W / 40.58694; -83.12722
Area	Less than 1 acre (0.40 ha)
Built	1910
Architect	James Knox Taylor; John W. Uncafer
Architectural style	Neoclassical
NRHP Reference #	90001777
Added to NRHP	November 28, 1990

The Old U.S. Post Office in Marion, Ohio was built in 1910. It was listed on the National Register of Historic Places in 1990. It is currently used as the Heritage Hall museum by the Marion County Historical Society. The museum is dedicated to the preservation of Marion County Ohio history. Heritage Hall is also home of the Wyandot Popcorn Museum, the "only museum in the world dedicated to popcorn and its associated memorabilia."