The Solonian constitution was created by Solon in the early 6th century BC. At the time of Solon the Athenian State was almost falling to pieces in consequence of dissensions between the parties into which the population was divided. Solon wanted to revise or abolish the older laws of Draco. He promulgated a code of laws embracing the whole of public and private life, the salutary effects of which lasted long after the end of his constitution.

Under Solon's reforms, all debts were abolished and all debt-slaves were freed. The status of the hectemoroi (the "one-sixth workers"), who farmed in an early form of serfdom, was also abolished. These reforms were known as the Seisachtheia. Solon's constitution reduced the power of the old aristocracy by making wealth rather than birth a criterion for holding political positions, a system called timokratia (timocracy). Citizens were also divided based on their land production: pentacosiomedimnoi, hippeis, zeugitae, and thetes. The lower assembly was given the right to hear appeals, and Solon also created the higher assembly. Both of these were meant to decrease the power of the Areopagus, the aristocratic council. The only parts of Draconian constitution that Solon kept were the laws regarding homicide. The constitution was written as poetry, and as soon as it was introduced, Solon went into self-imposed exile for ten years so he would not be tempted to take power as a tyrant.