Aligudarz (Persian: اليگودرز) is a city in the Central District of Aligudarz County, Lorestan province, Iran, serving as capital of both the county and the district.

At the time of the 2006 National Census, the city's population was 78,690 in 18,115 households. The following census in 2011 counted 87,967 people in 23,181 households. The 2016 census measured the population of the city as 89,268 people in 25,646 households.

Aligudarz is located 420 kilometres (260 mi) from Tehran and is in a region that is a mixture of plains and foothills, thus enjoying a mountainous, mild climate. Oshtorankuh Mountain range and Aligudarz River are here.

Aligudarz has a dry-summer continental climate (Dsa), bordering on a mediterranean climate (Csa) in Köppen climate classification.^{[citation needed]}

In the mountains and hills around Aligudarz, ancient objects have been discovered, including rectangular brick earthenware from the thirteenth century AD.

Important natural and historical sites of Aligudarz include:

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