The trittyes (/ˈtrɪti.iːz/; Ancient Greek: τριττύες trittúes), singular trittys (/ˈtrɪtɪs/; τριττύς trittús) were part of the organizational structure that divided the population in ancient Attica, and is commonly thought to have been established by the reforms of Cleisthenes in 508 BC.
Cleisthenes is credited with this change in the way the Athenians and their surrounding city-states (the area that is referred to as Ancient Attica) were organized.
[1] This resulted in the formation of each of the 139 demes (subdivisions of smaller city-states) into groups of trittyes.
[4] The goal of this new organization was to spread out the areas, make the representation more equal and help them be distributed more evenly.
[1] The trittyes were the larger denomination of tribes (Phyle) in Ancient Attica, and were formed by the demes that were near each other.
The trittyes were often unequal in size and, with that, representation in the judicial aspects of Ancient Attica.
[12] This is included to show the distribution of city and coastal trittys in the original ten phylai.
“DEME THEATERS IN ATTICA AND THE TRITTYS SYSTEM.” Hesperia: The Journal of the American School of Classical Studies at Athens, vol.
The Political Organization of Attics; a study of the Demes, Trittyes and Phylai, and their representation in the Athenian Council.