Yes, someone born in 1991 is considered a '90s kid.
'90s kids' generally refers to the generation born between 1985 and 1994. This cohort experienced their childhood and formative years during the 1990s, shaping their cultural references, technological understanding, and overall nostalgia for that decade. Therefore, being born in 1991 squarely places an individual within the '90s kid' demographic. They would have spent a significant portion of their childhood during the decade.
