United States | |
| Value | 50 cents (0.50 US dollars) |
|---|---|
| Mass | 12.5 g |
| Diameter | 30.61 mm (1.20 in) |
| Thickness | 2.15 mm (0.08 in) |
| Edge | Reeded |
| Composition |
|
| Silver | 0.36169 troy oz |
| Years of minting | 1918 |
| Mintage | 100,058 including 58 pieces for the Assay Commission |
| Mint marks | None, all pieces struck at the Philadelphia Mint without mint mark |
| Obverse | |
 | |
| Design | Abraham Lincoln |
| Designer | George T. Morgan |
| Design date | 1918 |
| Reverse | |
 | |
| Design | An eagle, adapted from the Seal of Illinois |
| Designer | John R. Sinnock |
| Design date | 1918 |
The Illinois Centennial half dollar is a commemorative 50-cent piece struck by the United States Bureau of the Mint in 1918. The obverse, depicting Abraham Lincoln, was designed by Chief Engraver George T. Morgan; the reverse, based on the Seal of Illinois, was by his assistant and successor, John R. Sinnock. Morgan's obverse is based on the statue by Andrew O'Connor.
A commemorative was wanted by the State of Illinois to mark the centennial of its 1818 admission to the Union, and in 1918, legislation was introduced into Congress to accomplish this. It met no opposition, though several amendments were made during the legislative process. After it passed, the two engravers produced designs, but Treasury Secretary William G. McAdoo required changes, not all of which were made.
The coins were minted in August 1918, and were sold to the public for $1 each. All sold, though many were held by a bank until 1933, and the profits used to defray the cost of local centennial celebrations or to help those in need because of World War I. Later writers have generally admired the coin, considering it one of the more handsome American commemoratives. The coin is valued in the hundreds of dollars today, though exceptional specimens may trade for more.