国内法，又称内国法，是相对外国法而言的法律概念。在国际私法当中涉及到准据法的选择时，该概念具有一定的意义。

• 国际私法
• 准据法
• 转致

Municipal law is the national, domestic, or internal law of a sovereign state defined in opposition to international law. Municipal law includes not only law at the national level, but law at the state, provincial, territorial, regional or local levels. While, as far as the law of the state is concerned, these may be distinct categories of law, international law is largely uninterested in this distinction and treats them all as one. Similarly, international law makes no distinction between the ordinary law of the state and its constitutional law.