To find a senator's address, go to the U.S. Senate website at Senate.gov and click on the "Senators" tab on the top of the page. This brings up a full list of current U.S. Senators, along with the mailing address and other contact information for each one.
The best way to contact a Senator is by either sending them an email, or sending them physical mail through the postal service. When searching for an address on the Senate website, users can narrow the search by "State," "Senator" or "Class" using the drop-down menus located at the top of the list. For those who are unsure of who a particular state's Senators are, there is also a link at the top right corner of the page to help in making the determination. Simply click on the "Find Your Senators" link, choose the appropriate state from the drop-down list, then select "Go."