汝矣岛（韩语：여의도／汝矣岛）是位于韩国汉江上的一个小岛，面积840公顷，现属首尔特别市永登浦区。汝矣岛是韩国证券交易所（现为韩国交易所的一部分）和韩国金融投资协会的所在地，为首尔的金融与投资中心，被誉为“韩国的华尔街”，是韩国地价最贵的地方。该岛也是许多韩国大公司，比如LG集团、KBS的总部所在地。此外韩国国会议事堂、大韩生命63大厦、首尔国际金融中心以及全球最大的基督教教堂汝矣岛纯福音教会亦设于该岛上。

汝矣岛是韩国著名的樱花观赏地。汝矣岛轮中路经国会议事堂至韩国放送公社前的大道两旁种满了樱花，被称为“樱花道”，长达10公里。早春时节樱花怒放时，“樱花道”会形成一条壮观的“樱花隧道”。岛上建有包括汝矣岛公园和汝矣岛汉江公园在内的5个公园，亦是休闲赏花的好去处。

Yeouido (Yoi Island or Yeoui Island) is a large island in the Han River in Seoul, South Korea. It is Seoul's main finance and investment banking district. Its 8.4 square kilometers are home to some 30,988 people. The island is located in the Yeongdeungpo-gu district of Seoul, and largely corresponds to the precinct of Yeouido-dong. The island contains the National Assembly Building, where the National Assembly of South Korea meets, Korea Financial Investment Association, the large Yoido Full Gospel Church, the 63 Building, and the headquarters of LG, KBS, and the Korea Exchange Center. Due mainly to its importance as a financial district and its central location, Yeouido is home to some of Seoul and Korea's tallest skyscrapers, including International Finance Center Seoul, the Federation of Korea Industries building, as well as the iconic 63 Building.