Aristotle Dionisio (born July 21, 1995) is a Filipino professional basketball player for the Titan Ultra Giant Risers of the Philippine Basketball Association (PBA). He was selected 9th overall in the 2019 PBA draft by Magnolia Hotshots.

Dionisio first played with the Manila Stars of the Maharlika Pilipinas Basketball League (MPBL). During his two-year stint with the Stars, he made two all-star appearances, won a Defensive Player of the Year award, and earned two All-MPBL selections.

On December 8, 2019, Dionisio was selected ninth overall by the Magnolia Hotshots in the 2019 PBA draft.

In 2024, Dionisio would make his first PBA all-star appearance as a replacement for Scottie Thompson, who was injured at the time.

On March 12, 2024, he signed a three-year contract extension with the Hotshots.

On October 28, 2025, Dionisio was traded to the Titan Ultra Giant Risers in exchange for Chris Koon.

As of the end of 2024–25 season