King Neptune (May 16, 1942 – May 14, 1950) was a pig used by a United States Navy recruiter to raise $19 million (equivalent to $321,560,074 in 2023) in war bonds for the construction of the Iowa-class battleship Illinois between 1942 and 1946.

Neptune was donated by Sherman Boner on December 5, 1942 and was originally intended to be served at a fundraising pig roast until the local navy recruiter had another idea.

The pig, who was mostly red and had white features, was often displayed covered with a blue Navy blanket and wearing a crown and silver earrings.

[6] In 1946, King Neptune was to be sent to the Chicago Stockyards; however, Lingle regained ownership of the pig and placed him on a local farm where he spent the rest of his life.

[8] He was buried with military honors about six miles (10 km) east of Anna, off Illinois route 146 at a location that became locally known as King Neptune Park.