How to send mail to Representative Mario Diaz-Balart

To write to Representative Mario Diaz-Balart, the Republican U.S. representative for Florida's 26th congressional district, address your letter to The Honorable Mario Diaz-Balart, U.S. House of Representatives, 374 Cannon House Office Building, Washington, DC 20515-0926. Any American can write to any member of Congress, but your own representative count you as a constituent and act on your casework. Note that mail to Capitol Hill is screened off-site and can take a few weeks — say who you are, keep it to one issue, and make a clear ask.

Mailing address

Verified July 2026

U.S. House of Representatives — Washington, DC office

The Honorable Mario Diaz-Balart
U.S. House of Representatives
374 Cannon House Office Building
Washington, DC  20515-0926

Reaches Mario Diaz-Balart's Washington office. Best for positions on bills and votes; for casework, the district office is often faster.

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Sources

Addresses verified July 2026 against official sources. Always confirm on the official site before time-sensitive filings.

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Key facts

  • Address mail to The Honorable Mario Diaz-Balart, U.S. House of Representatives, 374 Cannon House Office Building, Washington, DC 20515-0926. Unlike outgoing franked mail, letters you send to Congress need normal postage.
  • Mario Diaz-Balart is the Republican U.S. representative for Florida's 26th congressional district.
  • Identify yourself as a constituent: include your full name, home address, and ZIP so Diaz-Balart's staff can confirm you live in the district. Constituent mail is prioritized and tallied.
  • Mail to Capitol Hill is screened off-site for security and can take up to several weeks to arrive. For time-sensitive casework, the member’s in-state district office is usually faster.
  • One clear ask per letter — support or oppose a specific bill, request a meeting, or open a casework file. A personal letter carries more weight than a form email or petition signature.
  • Find Diaz-Balart's district office and contact form at https://mariodiazbalart.house.gov — but a printed letter is harder to overlook on issues you care about.
  • PostPal prints your letter and hands it to USPS the next business day for $5 — no printer, envelope, or stamps.

How to send your letter

  1. 1

    Confirm this is your representative

    Mario Diaz-Balart represents Florida's 26th district. Representatives take casework for people who live in their district — if you're unsure of yours, look it up by ZIP at house.gov.

  2. 2

    Say who you are and where you live

    Open with your full name, street address, and ZIP code. Offices sort mail by whether the writer is a constituent, and your address is how they confirm it. State your issue in the first line.

  3. 3

    Keep it to one issue with a clear ask

    One page, one topic, one specific request — support or oppose a named bill, take a position, or open a casework file. A short, specific letter gets a substantive reply; a multi-issue essay gets a form response.

  4. 4

    Send it without printing anything

    Write your letter in PostPal with Mario Diaz-Balart's address prefilled and we print, envelope, and mail it via USPS the next business day for $5 — with a dated confirmation email.

Common questions

What is Representative Mario Diaz-Balart's mailing address?

The Honorable Mario Diaz-Balart, U.S. House of Representatives, 374 Cannon House Office Building, Washington, DC 20515-0926. This is the Washington office; letters need normal postage.

How long does mail to Congress take to arrive?

Mail to Capitol Hill is routed through an off-site facility and screened for security, which can add up to several weeks. If your matter is urgent, the member’s in-state district office generally receives mail faster.

Do I have to be a constituent to write to Diaz-Balart?

Representatives prioritize people who live in their district, and casework is normally limited to constituents. You can still write about Diaz-Balart's position on national legislation from anywhere.

Will Mario Diaz-Balart actually read my letter?

Constituent mail is logged and answered by Diaz-Balart's staff, and issues raised repeatedly are flagged to the member. Include your return address (PostPal prints yours automatically) so a reply has somewhere to go.

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