Yi O (Chinese: 二澳) is a village on Lantau Island, Hong Kong.

Yi O is a recognized village under the New Territories Small House Policy.

• Lantau Trail
• Peaked Hill (Hong Kong)

• Hamilton, Eric; Schofield, Walter; Peplow, S. H.; Tsui, Paul; Coates, Austin; Hayes, James (2010). Strickland, John (ed.). Southern District Officer Reports: Islands and Villages in Rural Hong Kong, 1910-60. Hong Kong University Press. pp. 41–43. ISBN 9789888028382.

• Delineation of area of existing village Yi O (Tai O) for election of resident representative (2019 to 2022)

22°13′29″N 113°50′54″E / 22.224851°N 113.848273°E / 22.224851; 113.848273