北美共同货币（North American Currency Union，amero）是一理论上在未来的北美联盟中使用的货币。

实施将使三个国家放弃他们目前的货币单位（美元、加拿大元和墨西哥比索），并采用专门为此设立的新货币。（有些版本的理论，特别是那些仅在加拿大循环或假定只有美国和加拿大将流通的理论被包括在内。）对于假设性的联盟货币常被称为amero。这个概念是仿照欧洲联盟共同货币（欧元），它被认为是一个北美自由贸易协定（NAFTA）和北美安全和繁荣伙伴关系（SPP）的自然延伸。

阴谋理论家争辩说，美国、加拿大和墨西哥政府已采取一部分的步骤来实现作为“北美联盟（NAU）”的货币。

The North American monetary union is a theoretical economic and monetary union of three North American countries: Canada, the United States and Mexico.

Implementation would involve the three countries giving up their current currency units (U.S. dollar, Canadian dollar, and Mexican peso) and adopting a new one, created specifically for this purpose (some versions of the theory, particularly those circulating in Canada, assume only the United States and Canada would be included). The hypothetical currency for the union is most often referred to as the amero. The concept is modeled on the common European Union currency (the euro), and it is argued to be a natural extension of the North American Free Trade Agreement (NAFTA) and the Security and Prosperity Partnership of North America (SPP).