how old is eleven in season 1

Eleven is 12 years old in season 1 of Stranger Things.

Age in season 1

Most official and fan-reference sources agree that Eleven is around 12 during the events of season 1, making her the same age as Mike and the other boys. This lines up with her in‑universe birth year (1971) and the show’s 1983 setting.

Why there’s confusion

• Some early discussions and tie-in materials created minor inconsistencies about her exact age in certain flashbacks.

• Despite that, later breakdowns of the characters’ ages and cast/character comparisons consistently describe Eleven as 12 in season 1.

Information gathered from public forums or data available on the internet and portrayed here.