In the Toy Story series, it's never explicitly stated exactly how old Buzz Lightyear is. But based on the context and the timeline of the movies, one could estimate him to be roughly 30 years old.
Buzz Lightyear is believed to be around 30 years old in the Toy Story universe.
The age of Buzz Lightyear from Toy Story isn't precisely defined. However, considering the story's progression and events, a reasonable guess would be that he's approximately 30 years old.