ABSTRACT: Some of the classifications of contracts in U.S.A are as same as us meanwhile some of them are different. Basing on whether the contract is enforceability, jurisconsults divide contracts as valid contracts, void contracts, voidable contracts and unenforceable contracts. Depending on whether the offeree must do to accept the offer and to bind the offeror to a contract the contact is classified as bilateral contracts or unilateral contracts. In accord with the method used in creating an agreement the contract is distinguished between formal contracts and informal contracts. Depending on whether the terms of an agreement are fully and explicitly stated in words, oral or written, the contract is divided as express contracts or implied contracts. In accord to how to create the agreement the contract is different between quasi contracts and contracts implied in fact. For different types of the contract the court would use different method to deal with them.