The Anonymous Grammarian is a modern scholarly name for the unknown author or authors of a collection of Greek grammatical texts. These works were likely written between the 2nd and 5th centuries CE, a period of late antiquity marked by intense scholarly focus on preserving classical language. The figure represents the professional grammarians who taught and wrote in cultural centers like Alexandria and Constantinople.

This collective corpus consists of multiple short, practical treatises on technical subjects. Surviving works include texts "On Figures of Speech," "On Barbarism and Solecism," and studies on orthography and syntax. The exact number and authorship of these texts are uncertain, as they were copied, excerpted, and compiled anonymously over centuries within the medieval manuscript tradition.

According to modern scholars, the significance of these anonymous works lies in their role as educational handbooks. They provide direct insight into the teaching methods and linguistic ideals of the era, particularly the effort to standardize Greek and guard against incorrect usage. While not highly original in theory, they were crucial vehicles for transmitting grammatical knowledge from authorities like Dionysius Thrax. This technical scholarship helped preserve the understanding of classical Greek language through the Byzantine period and into the Renaissance.