Technically, all land within the borders is the state's, as the state is the one patrolling the borders, and enforcing the rules within them. However, the state owns it on behalf of the people, which is you. Well, it is, the federal reserve owns the american currency, especially after laws that made it their sole authority to print and loan out the fiat currency their seal is stamped on. This is true, you own your person, and that cannot be contested, until, the state decides to claim you as their property, then you are theirs by right of might.