Theophilus Dicaeus (Ancient Greek: Θεόφιλος Δίκαιος, romanized: Theophilos Dikaios) was a minor Indo-Greek king who ruled for a short time in the Paropamisadae. He was possibly a relative of Zoilus I and is only known from coins. It is possible that some of Theophilus' coins in fact belong to another ruler, in Greek Bactria, during approximately the same period.