奥兰乔省（Departamento de Olancho）是洪都拉斯东南部的一个省。东南与萨尔瓦多接壤。面积23,905平方公里，是全国最大的省份。人口约500,000（2006年）。首府胡蒂卡尔帕。

1825年6月25日建省。下分二十三个自治市。

Olancho is one of the 18 departments into which Honduras is divided. It is the largest of all the departments, and Hondurans frequently point out that the department is larger than the neighboring Republic of El Salvador because it is.

The department covers a total surface area of 24,057 km² and has an estimated 2015 population of 537,306 inhabitants.