What is the most valuable US stamp?
Short answerThe most valuable US stamp is the 1918 24¢ Inverted Jenny, with a single example selling for over $2 million. Other top rarities include the 1868 1¢ Z Grill and the 1856 5¢ Alexandria Blue.
The Inverted Jenny
The 1918 24¢ Inverted Jenny (Scott C3a) is the most famous US stamp error. It shows a Curtiss JN-4 airplane upside down. Only 100 were found, and a single stamp in fine condition can sell for $1.5 million to $2 million or more at auction.
In 2021, a block of four sold for over $4.8 million. The stamp's iconic status and rarity make it the benchmark for US philately.
- Issued: 1918
- Error: inverted center (airplane upside down)
- Known examples: 100
- Recent sale: single stamp $2 million+ (2023)
Other Top Rarities
The 1868 1¢ Z Grill (Scott 85A) is extremely rare, with only two known examples. One sold for $935,000 in 2005 and is now in the New York Public Library. The 1856 5¢ Alexandria Blue is another gem, with only a few known; it has sold for over $1 million.
These stamps rarely appear at auction, and when they do, they command seven-figure prices. Condition and provenance are critical.
- 1868 1¢ Z Grill: only 2 known, valued at $1 million+
- 1856 5¢ Alexandria Blue: $1 million+
- 1869 3¢ inverted center: $200,000+
- 1901 2¢ Pan-American invert: $100,000+
Common mistakes
- Thinking any old stamp is worth a fortune—most are common.
- Confusing the Inverted Jenny with other inverted errors that are less valuable.
- Overlooking condition: even a rare stamp in bad shape may sell for a fraction of its catalog value.
