Dionisio Urreisti Beristain (born 17 March 1943) is a Spanish retired footballer who played as a right winger, and a current manager.

Urreisti was born in Mutriku, Gipuzkoa, Basque Country, and joined Real Sociedad's youth setup in 1960, aged 17.

Urreisti appeared in 23 league matches for Sanse during his debut campaign, scoring six goals.

[1] Urreisti made his first team debut on 16 September 1962, scoring in a 6–1 routing of CD Ourense.

After being sparingly used in his first season, he subsequently became an undisputed starter for the side, winning promotion back to the top level in 1967.