How many senators currently in the senate?

100. There are 2 from each state. 2X50= 100.

At the moment there are only 99; Senator Ted Kennedy is off ill.

Rebuttle answer

Actually,he is still a senator if he is sitting in house or not. So, there are 100. He does attend sessions because he has been working on the health care bill.

Kennedy since has died and been replaced by a Republican in a special election.