John Thune Fax Number — (202) 228-5429

How to address your fax to John Thune

By convention, correspondence to a U.S. senator is addressed to “The Honorable John Thune”, with the salutation “Dear Senator Thune”. Postal mail and courier deliveries reach the office at: The Honorable John Thune, United States Senate, Washington, DC 20510.

What to include

One issue per fax. Reference a specific bill number or regulation if you have one — offices sort mail by topic, and a single clear ask gets tallied accurately.
Your name and mailing address. Senate offices prioritize constituents; an address in South Dakota signals your position should be counted as a South Dakota voter.
Keep it to one page. A short, specific message — what you want the senator to do, and why it matters to you — is read fully and logged.

Why fax still works for Senate offices

Security screening delays physical mail to Capitol Hill by weeks, and email forms bury individual messages. Fax arrives the same day with a timestamped transmission record, which is why offices — and the advocacy groups that track them — still publish fax numbers. Sending online, you get the delivery confirmation without a fax machine.

Frequently asked questions

What is John Thune's fax number?

John Thune's published Senate office fax number is (202) 228-5429. Send a fax to Senator Thune online for $0.50 per page — no account or fax machine required.

How do I address a fax to John Thune?

Address the cover page to “The Honorable John Thune” and open the message with “Dear Senator Thune”. Including your full name and mailing address helps the office verify you are a constituent.

Does John Thune actually read faxes?

Senate offices log every fax that arrives and count positions on issues, even when replies come by mail or email. Faxes are timestamped, which makes them useful as a written record of where you stood and when.

Fax John Thune