Noah was born in New York City to Mitchell and Karine Schnapp and was raised in Scarsdale, New York.

Noah holds both US and Canadian citizenship. His father is of Russian Jewish descent, while his mother is of Moroccan Jewish descent.

There isn’t much information about his parents on the internet however, his parents have supported him in his acting career.

Schnapp publicly came out as gay in a video posted to his Tik Tok account on January 5, 2023.

The video saw him express relief that family and friends had accepted his coming out, and he quipped in the video’s caption “I guess I’m similar to Will (Byers) than I thought” referring to his Stranger Things character as being gay.