中美洲联邦共和国（西班牙语：República Federal de Centroamérica），立国之初又称作中美联合省（西班牙语：Provincias Unidas del Centro de América)）。是一个已不存在的民主共和国。位于中美洲，存在于1821年9月至1841年，由过去新西班牙的危地马拉都督府领土组成。又译作中美联合省、中美洲联合省、中美洲联邦。有时会被误译为中美洲合众国。领土包括今日的危地马拉、萨尔瓦多、洪都拉斯、尼加拉瓜、哥斯达黎加，以及墨西哥东部恰帕斯州的一部分。

The Federal Republic of Central America (Spanish:República Federal de Centroamérica), also called the United Provinces of Central America (Spanish:Provincias Unidas del Centro de América) in its first year of creation, was a sovereign state in Central America, which consisted of the territories of the former Captaincy General of Guatemala of New Spain. It existed from September 1821 to 1841, and was a republican democracy. It is also sometimes incorrectly referred to in English as the United States of Central America.