Congressmen may be re-elected for an unlimited number of terms; representatives serve unlimited two-year terms, while Senators serve unlimited six-year terms. There are 435 congressmen or members of the House of Representatives.
In order to be eligible to run for office in the House of Representatives, a person must be at least 25 years old and have been a United States citizen for the previous 7 years. The qualifications to run for office as a Senator include being of at least 30 years of age and being a United States citizen for the previous 9 years. All members of Congress also must live in the state that they want to represent.
In addition to the 435 congressmen, there are also five Delegates in the House who represent the District of Columbia, American Samoa, the U.S. Virgin Islands, Guam and the Commonwealth of the Northern Mariana Islands; there is also a Resident Commissioner who represents Puerto Rico.