Federal · Senate (upper house)
Matt O'Sullivan
Senator Matt O'Sullivan
What's this? The Senate is the upper house of federal Parliament. It reviews and votes on laws passed by the House of Representatives. Each state elects 12 senators and each territory 2, so a senator represents their whole state or territory.
Where letters go
Electorate office
Senator Matt O'SullivanPO Box 3466Success WA 6964☎ (08) 9226 5387
Source: official parliament listing · updated 20/10/2026
How to write to Matt O'Sullivan
Address your letter exactly like this. Keep it to one page, say who you are and where you live, and ask for one clear action.
Senator Matt O'Sullivan
PO Box 3466
Success WA 6964
Dear Senator O'Sullivan,
I'm writing to you as Shadow Minister for Choice in Childcare and Early Learning about…
Questions about Matt O'Sullivan
What is Matt O'Sullivan's office address?+
Letters to Matt O'Sullivan go to their electorate office: PO Box 3466, Success WA 6964. The office phone number is (08) 9226 5387.
How do I address a letter to Matt O'Sullivan?+
On the envelope and at the top of your letter, write “Senator Matt O'Sullivan” followed by the address. Start the letter with “Dear Senator O'Sullivan,”.
What is Matt O'Sullivan's role?+
Matt O'Sullivan is Shadow Minister for Choice in Childcare and Early Learning and Senator for Western Australia in the Australian Senate.
Which party is Matt O'Sullivan in?+
Matt O'Sullivan is a member of the Liberal Party of Australia.
Can I send Matt O'Sullivan a letter online?+
Yes. Better Letters prints your letter, signs it with your signature, and posts it to Matt O'Sullivan's office. You can also download it free and post it yourself.