Hiroyuki Nishiuchi (西内 洋行, Nishiuchi Hiroyuki) (born October 13, 1975) is an athlete from Japan.
He took forty-sixth place with a total time of 1:56:59.76.
Four years later, at the 2004 Summer Olympics, Nishiuchi competed again.
He placed thirty-second with a time of 1:57:43.51.
This biographical article related to a Japanese athlete known for competing in triathlons is a stub.