希亚多（Chiado）是葡萄牙首都里斯本的一个广场及其周边地区的名称，位于上城（Bairro Alto）和下城（Baixa Pombalina）之间。

希亚多是一个传统的购物区，混合了古老和现代商业机构，特别集中在卡尔莫街和加雷特街。当地人和游客来到希亚多，购买书籍，服装，陶器，或喝上一杯咖啡。希亚多最著名的咖啡馆是巴西人咖啡馆（A Brasileira），诗人费尔南多·佩索阿是其顾客。希亚多也是一个重要的文化区，拥有几个博物馆和剧院。

希亚多的一些建筑物在1988年被一场可怕的大火所摧毁，这一事件震惊了全国。修复工程超过10年，由著名建筑师西扎·维埃拉（Siza Vieira）协调，受影响的地区现已恢复。

Chiado (Portuguese pronunciation: [ʃiˈaðu]) is the name of a square and its surrounding area in the city of Lisbon, Portugal. The Chiado is located between the neighbourhoods of Bairro Alto and Baixa Pombalina.

It is a traditional shopping area that mixes old and modern commercial establishments, mostly located at the Carmo and Garrett streets. The most well-known café of Chiado is "A Brasileira", famous for having had poet Fernando Pessoa among its customers, and today it is very popular among tourists. The Chiado is also an important cultural area, with several museums and theatres.