'''Tricorythus''' or '''Trikorythos''' ({{lang-langx|grc|Τρικόρυθος}}) or '''Tricorynthus''' or '''Trikorynthos''' (Τρικόρυνθος) or '''Tricorinthus''' or '''Trikorinthos''' (Τρικόρινθος) was a [[deme]] of [[ancient Athens]], in the plain of [[Marathon, Greece|Marathon]] in northeast [[ancient Attica|Attica]]. It along with [[Oenoe (Marathon)|Oenoe]], Marathon, and [[Probalinthus]], formed the [[Tetrapolis (Attica)|Attic Tetrapolis]], one of the twelve districts into which Attica was divided before the time of [[Theseus]]. The plain near Tricorythus was where the right of the [[ancient Persia|Persian]] army were forced into the marsh during the [[Battle of Marathon]].
The site of Tricorythus is located northeast of [[Kato Souli]].<ref>{{Cite Barrington|59}}</ref><ref>{{Cite DARE|31198}}</ref>
