India is a country of over 1 billion people.

[thehammer]

Which one is correct?

1- India is a country of over 1 billion people.

2- India is a country with over 1 billion people.

 

[jutfrank]

Are you asking about grammar? Neither is incorrect.

 

[Barque]

I'd prefer "a billion" (or "one billion") to "1 billion". Without context, the one with "of" reads better to me. I agree "with" isn't incorrect.