It's changed a bit since 2e.
A small fragment of the Forgotten Realms Player's Guide.
This applies to 4e, but is probably still more or less up to date.
"As long as one obeys the laws, anyone is free to walk
the streets of Baldur’s Gate. The city prides itself
on being an open place where anyone can become
a citizen or start a new life, regardless of race or
background.
Still, one is unlikely to see many trolls, orcs, ogres,
or drow walking the streets. The city’s population is
mostly human, with significant numbers of eladrin
and elves as well."
