Paradoxographer Anonymous refers to the unknown compilers working within the Hellenistic paradoxographical tradition, active from approximately the 3rd to the 1st centuries BCE. Their work involved collecting paradoxa, which were accounts of marvels and strange phenomena pertaining to nature, geography, and human customs. These writers were likely scholars connected to major intellectual centers such as the Library of Alexandria, participating in the systematic organization of knowledge.

The surviving corpus consists of several anonymous collections. Major examples include the Paradoxographus Vaticanus, possibly from the 3rd century BCE, which records 51 zoological marvels. The Paradoxographus Florentinus, dated to the 2nd or 1st century BCE, contains 37 marvels often derived from the scholar Callimachus. Other texts include the Paradoxographus Palatinus and the Paradoxographus Britannicus. These works are fundamentally compilations, extensively excerpting and repackaging material from earlier authors such as Herodotus, Aristotle, and Theophrastus.

The anonymous paradoxographers played a significant role in preserving classical knowledge of wonders and transmitting it into later antiquity. Their genre, which intersects geography, natural history, and folklore, exemplifies the Hellenistic encyclopedic impulse. These collections served as important sourcebooks for later writers, including Pliny the Elder, and they illustrate the complex boundaries between ancient scientific inquiry and popular belief.