Assassin's in their ranks?

Of the Dark Brotherhood?

Any, its diverse.

I mean races in general, which race as a whole has more assassins then any other.

I'd say dunmer, because of the Morag Tong, or Argonians, because of Shadowscales.

Probably the Dunmer. They have an ancient guild for assasins, the Morag Tong.
Also, to a lesser degree, the Cammona Tong.

Dunmer or Argonian

Cool, thanks yall.

I agree Dunmer or Argonian, but I feel like Bosmer is a good race that "makes" an Assassin, even though you don't see many.

I thought that was the point...

Right. Whichever race seems like it has the least assassins, may actually have the most. Or at least ones that are good at their occupation.