阿拉伯合众国是由阿拉伯联合共和国（包含埃及与叙利亚）与也门王国（即后来的北也门）在1958年至1961年所组成的邦联。

阿拉伯联合共和国是埃及和叙利亚在1958年结合形成的一个主权国家，同年北也门与埃及签署了一项防务协议，于1958年创建一个松散的邦联称为阿拉伯合众国，然而，与阿拉伯联合共和国的各成员国不同的是，北也门仍然是一个独立的主权国家。在整个邦联的期间，始终保持其联合国会员国和独立的大使馆。

在叙利亚于1961年9月28日退出阿拉伯联合共和国后，阿拉伯合众国于同年12月26日也宣布解散。

The United Arab States (UAS) was a short-lived confederation of the United Arab Republic (Egypt and Syria) and North Yemen from 1958 to 1961.

The United Arab Republic was a sovereign state formed by the union of Egypt and Syria in 1958. The same year, the Mutawakkilite Kingdom of Yemen (North Yemen), which had already signed a defense pact with Egypt, joined with the new state in 1958 in a loose confederation called the United Arab States. However, unlike the member countries of the United Arab Republic, Yemen remained an independent sovereign state. It maintained its UN membership and separate embassies throughout the whole period of confederation.