Porcupine is the name used by two fictional characters appearing in American comic books published by Marvel Comics: Alexander Gentry, a weapons designer who uses his porcupine battlesuit in an attempt to become wealthy through crime, as one of the first costumed professional criminals of his generation, and Roger Gocking, a criminal who purchased the suit to commit crimes, before joining the Thunderbolts and reforming, joining Ben Urich and Jessica Drew as a private investigator, and as nanny to the latter's son Gerry, before eventually coming to date Jessica himself.

The Alexander Gentry incarnation of Porcupine appeared in the Marvel Cinematic Universe (MCU) series She-Hulk: Attorney at Law, portrayed by Jordan Aaron Ford.

The first Porcupine, Alexander Gentry, first appeared in Tales to Astonish #48 (October 1963) and was created by Stan Lee and Don Heck.

The second Porcupine, Roger Gocking, first appeared in Daughters of the Dragon #3 (May 2006) and was created by Justin Gray, Jimmy Palmiotti, and Khari Evans.

Alexander Gentry was originally a scientist who worked as a weapons designer for the United States Army. He conceived the idea of designing a battlesuit in imitation of a porcupine: it would be covered with quill-like projections for defense. Moreover, it would be able to shoot its quills, or gases, flames, chemicals, paralysis-inducing pellets, or weapons from quill-like tubes, at an opponent. Gentry spends months working overtime to create his porcupine battlesuit. He is proud of his achievement when the suit was finished, and believes his invention is worth a fortune. Yet Gentry also believes that the government would pay him, one of its employees, virtually nothing for his creation. Angrily, Gentry decides to keep the porcupine battlesuit and to use it to become wealthy through crime. Thus Gentry became the Porcupine, one of the first costumed professional criminals of his generation. Hank Pym, the Ant-Man, and his partner, Janet van Dyne, the Wasp, soon defeat the Porcupine when he attempts to rob a bank. However, the Porcupine escapes. After Pym had also assumed the superhuman powers and identity of Giant-Man, Porcupine returns for revenge. During the resulting battle, the Porcupine consumes what he thinks is a Giant-Man growth serum, but which instead shrinks him to microscopic size. Eventually, the capsules' effect wore off, and the Porcupine, again at his normal size, is among the many costumed menaces assembled by Doctor Doom to disrupt the wedding of Reed Richards and Susan Storm.

His self-confidence still shaken by his failures in battling Giant-Man and the Wasp, the Porcupine eagerly accepts the invitation of Count Nefaria, a powerful figure in the criminal Maggia, to join his group of costumed agents. Among Nefaria's agents are Plantman, the original Eel, the original Unicorn, and the Scarecrow, all of whom the Porcupine would ally himself with in the future as well. The Porcupine and the other costumed agents aid Count Nefaria in his attempt to hold much of Washington D.C. for ransom. However, the X-Men thwart Nefaria and his agents. Once again, the Porcupine escapes being taken prisoner, and he blames the failure of the blackmail scheme on Nefaria and the other agents. Gentry comes to suspect that in fact he himself was inadequate for the role of being a "super-villain" battling superhuman opponents.

Porcupine enlists as a member of Batroc's Brigade. As a Brigade member, the Porcupine unsuccessfully battles Captain America. Months later, the Porcupine and his allies, Plantman, the original Eel and the Scarecrow, go to work for the masked criminal mastermind the Cowled Commander on his crime spree. Once again, the Porcupine clashes with Captain America and is defeated.

Convinced that they are failures, Gentry and Leopold Stryke, the original Eel, seek guidance from the Celestial Mind Control movement, which is secretly masterminded by the alien Nebulon. Nebulon pits the Porcupine and the Eel against his foes, the Defenders, who defeat them both.