The Rubincam Numbers in Ancient Greek Historiography Project set out some 25 years ago to compile statistics on a standard set of aspects of every number in all the works of pagan Greek historiography produced between c. 500 BCE and c. 300 CE of which a substantial amount has survived in the manuscript tradition (works surviving only in fragments were necessarily excluded). The procedure involved the insertion into the text of a set of codes to capture a standard constellation of details concerning each number (the Type of Number, the Subject Category of the reference, the presence and Type of any Qualification), which facilitated the extraction of these data in a standard format. The data tables displayed here contain the coded numbers from the earliest six works in the project (Herodotus, Thucydides, Xenophon Anabasis and Hellenica, Polybius, and Diodorus Siculus). A key to the coding system is also provided. Additional data will be added as it becomes available.