中大西洋地区， 通常是指美国境内的在新英格兰和美国南大西洋地区之间的地区。根据不同来源，有不同的定义，它一般包括纽约、新泽西州、宾夕法尼亚州、特拉华州、马里兰州、华盛顿特区以及西维吉尼亚州I。当讨论气候时，通常也把康乃狄克州（尤其是其南部）作为此地区的一部分。 本地是美国文化、商业、贸易和工业的重要组成部分。

它曾被Frederick Jackson Turner称为"代表性的美国地区"。因为众多的在英治时期的荷兰、瑞典、英国天主教和贵格会移民，多宗教和多种族成为本地区社会的一部分，并保持至今。在美国革命后，中大西洋地区包含美国各州首府，包括当时的联邦首都——华盛顿特区。

The Mid-Atlantic, also called Middle Atlantic states or the Mid-Atlantic states, form a region of the United States generally located between New England and the South Atlantic States. Its exact definition differs upon source, but the region often includes New York, New Jersey, Pennsylvania, Delaware, Maryland, Washington D.C., Virginia, and West Virginia. When discussing climate, Connecticut (especially southern Connecticut) is often included with the Mid-Atlantic region. The Mid-Atlantic has played an important role in the development of American culture, commerce, trade, and industry.