黄犬契约（英文：yellow-dog contract），是来源于英美劳动法的一种熟语，意指企业雇主在雇用劳动者时，以“劳动者不得加入工会，或者脱离工会”为条件，与劳动者签订的契约。

黄犬契约的目的在于限制劳动者的自由结社权，并且削弱工会与企业主进行抗争和谈判的实力，侵犯了各国劳动法和宪法中规定的劳动者的基本权利，因此世界各国普遍禁止企业签订黄犬契约。以美国为例，此种签约模式已为1932年的联邦制定法诺里斯-拉瓜地亚法(Norris-La Guardia Act)禁止。在日本，则是为劳动组合法第七条禁止。在台湾，则以《工会法》第三十五条第二款（「对于劳工或求职者以不加入工会或担任工会职务为雇用条件」）禁止。

A yellow-dog contract (a yellow-dog clause of a contract, or an ironclad oath) is an agreement between an employer and an employee in which the employee agrees, as a condition of employment, not to be a member of a labor union. In the United States, such contracts were, until the 1930s, widely used by employers to prevent the formation of unions, most often by permitting employers to take legal action against union organizers. In 1932, yellow-dog contracts were outlawed in the United States under the Norris-LaGuardia Act.