Holly Wheeler is portrayed as being around 9–10 years old in Stranger Things Season 5.

On‑screen stated age

• In Season 5 Episode 4, a classroom conversation indicates that Holly and her classmates are roughly 9–10 years old, which is treated as her in‑story age for the season.

• Several outlet breakdowns of the character ages for Season 5 also list Holly as about 10 years old during the events of the final season.

Timeline vs. stated age

• The series timeline suggests she would be about 7, since she is introduced as roughly 3 years old in Season 1 (set in November 1983) and Season 5 takes place in November 1987.

• The show effectively ages her up a bit so she can have a larger, more active role, which is why dialogue and coverage now describe her as around 9–10 in Season 5.