Yuko Aoki (青木裕子, Aoki Yūko) is a Japanese bikini model known for her large breasts who was born on February 5, 1977 in Takahata, Yamagata Prefecture, Japan. She first started modeling in 1995, and became a "Visual Queen of the Year" at Fuji TV for 1996. She was a frequent cover girl on Japanese bikini photo magazines in the late 1990s. She appeared in the advertising campaign for Suntory's Milpower (ミルパワー, mirupawaa) product.

Aoiki stopped modeling in 1998, and "officially" retired from modeling in 2000 and is now focusing on a music career, which was her first interest.