How many U.S. Senators are there?

1. The Senate is one of the two parts of Congress. 2. There are one hundred U.S. Senators in all. 3. Four hundred is closer to the size of the House of Representatives, which has far more members than the Senate. _Source: USCIS Civics Flash Cards M-623 (rev. 02/12), public domain, official civics question 18_