Tammy Duckworth Fax Number — (202) 228-0618

How to address your fax to Tammy Duckworth

By convention, correspondence to a U.S. senator is addressed to “The Honorable Tammy Duckworth”, with the salutation “Dear Senator Duckworth”. Postal mail and courier deliveries reach the office at: The Honorable Tammy Duckworth, 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 Illinois signals your position should be counted as a Illinois 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 Tammy Duckworth's fax number?

Tammy Duckworth's published Senate office fax number is (202) 228-0618. Send a fax to Senator Duckworth online for $0.50 per page — no account or fax machine required.

How do I address a fax to Tammy Duckworth?

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

Does Tammy Duckworth 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 Tammy Duckworth