John O'Connor

John O'Connor

Tax Law
Recognized in Best Attorney USA since 2021

About John

John O'Connor is a partner and Co-Head in the Tax Group in Toronto. John's practice involves all areas of corporate tax, focusing primarily on complex mergers, acquisitions and reorganizations, along with advising tax-exempt entities. In addition, John regularly consults on a variety of technical tax matters.

John O'Connor is a partner and Co-Head in the Tax Group in Toronto. John's practice involves all areas of corporate tax, focusing primarily on complex mergers, acquisitions and reorganizations, along with advising tax-exempt entities. In addition, John regularly consults on a variety of technical tax matters.

John O'Connor is a partner and Co-Head in the Tax Group in Toronto. John's practice involves all areas of corporate tax, focusing primarily on complex mergers, acquisitions and reorganizations, along with advising tax-exempt entities. In addition, John regularly consults on a variety of technical tax matters.

Practice Areas

Awards & Recognition

Contact Me

Login Required

Please login to contact this attorney

Login to Contact

Reviews

4.5 / 5

39 Reviews

1,038 Profile Views

S

Sandy Kiehn

Feb 04, 2026

John O'Connor did a great job handling my complex Tax Law case from start to finish

I've worked with a few lawyers in Toronto over the years, but John O'Connor stands out for their honesty and thoroughness. They were clear about the process and kept me updated at all times. I felt co...

K

Kristin Wehner

Feb 04, 2026

Reliable lawyer you can count on - John O'Connor provided excellent service throughout

I appreciate how John O'Connor handled my case. No fluff, just straight to the point and very effective representation for my Tax Law matter. They are obviously very experienced and know how to naviga...

A

Al Grant

Feb 04, 2026

Great people who truly care at John O'Connor - the best legal team in Ontario

I've already told all my friends and family about John O'Connor. If you need Tax Law help in Ontario, they're the ones to see without any doubt. They are local experts who really understand the commun...

W

Whitney Lueilwitz

Feb 04, 2026

Simply amazing representation from John O'Connor's office during my recent legal matter

I was really stressed about my case in Toronto, but John O'Connor made everything so smooth and stress-free. Seriously, the best decision I've made lately was hiring them. They handled every detail wi...

S

Sheila Hills

Feb 04, 2026

Professional service and clear communication provided by John O'Connor in Toronto

I appreciate how John O'Connor handled my case. No fluff, just straight to the point and very effective representation for my Tax Law matter. They are obviously very experienced and know how to naviga...