How many state laws have been declared unconstitutional?

The exact number of state laws declared unconstitutional varies over time as new cases are decided by courts. However, thousands of state laws have been struck down or invalidated by courts, particularly by the U.S. Supreme Court and lower federal courts, often on grounds such as violations of constitutional rights or federal law. The frequency and context of these declarations depend on legal challenges and the evolving interpretation of the Constitution. For precise figures, one would need to consult legal databases or resources that track such judicial decisions.