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How to send mail to Representative Mia Costello

To write to Representative Mia Costello, the Republican representative representing Alaska's 15th legislative district, address your letter to The Honorable Mia Costello, Alaska State House of Representatives, 1500 W. Benson Blvd., Anchorage, AK 99501. This is Costello's standing constituent-mail address — reachable year-round, unlike a capitol-session address. Say who you are, keep it to one issue, and make a clear ask.

Alaska State House of Representatives — district office

The Honorable Mia Costello
Alaska State House of Representatives
1500 W. Benson Blvd.
Anchorage, AK  99501

The address Alaska's legislature publishes for Mia Costello's constituent mail — reachable year-round, including when the legislature is out of session.

Verified September 2026akleg.govopenstates.org

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The Honorable Mia CostelloAlaska State House of Representatives1500 W. Benson Blvd.Anchorage, AK 99501

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Key facts

  • Address mail to The Honorable Mia Costello, Alaska State House of Representatives, 1500 W. Benson Blvd., Anchorage, AK 99501. Letters you send need normal postage.
  • Mia Costello is the Republican representative representing Alaska's 15th legislative district.
  • Say who you are and where you live: include your full name and home address so Costello's office can confirm you're a constituent — that's who casework and replies are prioritized for.
  • This is Costello's standing constituent-mail address, not the state capitol — it's reachable year-round, including when the legislature is out of session, so it's the more reliable address for mail.
  • One clear ask per letter — support or oppose a specific bill, request help with a state agency, or ask for a meeting. A short, specific letter gets a real reply; a multi-issue letter gets a form response.
  • Find Costello's official page and other contact options at https://akleg.gov/legislator.php?id=cos.
  • 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 Mia Costello is your representative

    Mia Costello represents District 15 in the Alaska State House of Representatives. If you're not sure which district you live in, look it up by address on your state legislature's website before writing.

  2. 2

    Say who you are and where you live

    Open with your full name, street address, and ZIP code. Legislative offices sort mail by whether the writer is a constituent — your address is how they confirm it.

  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 ask for help with a state agency. Specific beats broad.

  4. 4

    Send it without printing anything

    Write your letter in PostPal with Mia Costello'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 Mia Costello's mailing address?

The Honorable Mia Costello, Alaska State House of Representatives, 1500 W. Benson Blvd., Anchorage, AK 99501. This is Costello's district office; letters need normal postage.

Why a district office and not the state capitol?

Most state legislatures are only in session part of the year, and capitol-office assignments can change every session. The district office is Costello's standing, year-round address — the one Alaska's legislature itself publishes for constituent mail.

Do I have to live in Costello's district to write?

Anyone can write, but Costello's office prioritizes constituents for casework and replies. If you live in the district, say so and include your address.

Will Mia Costello actually read my letter?

Constituent mail is logged by staff and tallied on issues that come up repeatedly. Include your return address (PostPal prints yours automatically) so a reply has somewhere to go.

Sources

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

See the full Alaska state legislators rules — what you can and can’t send, photos & more →

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