The Waino Tanttari Field Hay Barn is a barn built with traditional Finnish log construction in Waasa Township, Minnesota, United States.

It was built in 1935 by Finnish American farmer Waino Tanttari, and stands in isolation a quarter mile from the main cluster of buildings on the farmstead.

[2] The Tanttari Barn was listed on the National Register of Historic Places in 1990 for its state-level significance in the theme of agriculture.

[3] It was nominated for reflecting the successful conversion of northeastern Minnesota's cutover forests into farmland by late-19th and early-20th-century Finnish American settlers.

[2] It has a hay hood.