Where were the first state constitutions that established an elected governor senate and assembly?

The first state constitutions that established an elected governor, senate, and assembly were created in the early United States, particularly in the states of New Jersey, Pennsylvania, and Delaware. These constitutions emerged in the late 18th century, following the American Revolution, as states sought to create frameworks for self-governance. New Jersey's constitution of 1776, for example, included provisions for an elected governor and a legislative assembly, setting a precedent for other states.