It's "in the suburbs". A suburb is typically a residential area with a border around it. Since you can be in it, the correct preposition to use is "in".
It's "in the suburbs". A suburb is typically a residential area with a border around it. Since you can be in it, the correct preposition to use is "in".
My sister lives in the suburbs.
My sister lives on the suburbs.
By contrast, the outskirts (the outside part of a city) have no clear delimitations, and as a result we usually say "on the outskirts" (not "in the outskirts").
Follow the same practice with the singular form "suburb".
She was born in a suburb of Chicago.
What's the difference between "suburb" and "the suburbs"? While a suburb is a residential area near a city, the suburbs are simply a group of these.
Olivia lives in a suburb of London.
She grew up in the suburbs.
