Valerius Apsines was a Greek teacher of rhetoric active in the 3rd century CE, during the period of the Roman Empire. He was born in Gadara, a city in the Roman East (modern Jordan), but his career was centered in Athens. There, he achieved the prestigious, publicly funded chair of rhetoric. His career flourished under Emperor Maximinus Thrax (reigned 235–238 CE), to whom he addressed a speech. According to later historical sources, he was honored with a statue in the Athenian agora.

He is a representative of the later phase of the Second Sophistic, a movement focused on reviving classical Greek oratory. His professional success placed him among the leading intellectual figures of his day, though his name is sometimes confused with a contemporary rival from the same city.

Two of his works are known. His Art of Rhetoric is a technical handbook that partially survives. It systematically covers the standard parts of oratory, with a particularly detailed treatment of speech introductions. This work is a crucial source for understanding how rhetoric was taught and practiced in the 3rd century. He also wrote On Figured Problems, a treatise on advanced declamation, but this work is now lost.

According to modern scholars, his surviving handbook is significant as a culmination of the Greco-Roman rhetorical tradition. It provides valuable insight into the school exercises of the era and was used as a reference by later rhetoricians, including scholars in the Byzantine period.