The 700-pound, stainless steel toadstool will be lowered from a crane Dec. 31 as residents of Kennett Square count down to the New Year.
A local newspaper reports the sculpture will be more than 7 feet wide and 8 feet tall.
Kennett Square calls itself the mushroom capital of the world because area farms account for about half of U.S. mushroom production.
The mushroom joins a slew of quirky New Year's Eve traditions in Pennsylvania.
In Bethlehem, residents celebrate Jan. 1 by lowering an 85-pound statue of a Marshmallow Peep, since the treats are made locally. In Easton, officials drop a 10-foot-tall lighted crayon because the city is home to Crayola Inc.