There is no one set of features that are common to all state constitutions in the United States. However, there are some features that are commonly found in many state constitutions.
Separation of Powers: Most state constitutions provide for a separation of powers between the different branches of government (legislative, executive, and judicial), and establish checks and balances to prevent any one branch from becoming too powerful.
Local Government: Many state constitutions provide for the establishment of local governments, such as counties and municipalities, and set out their powers and responsibilities.
Education: Many state constitutions include provisions related to education, such as the establishment of a public education system and the allocation of funding for education.