Law Office of Cosmas Onyia
3636 North Central Avenue, Phoenix, AZ 85012
About Us

The Law Office of Cosmas Onyia is a reputable legal institution located at 3636 North Central Avenue in Phoenix, Arizona. Specializing in various areas of law, including criminal defense, personal injury, and immigration, Attorney Cosmas Onyia provides expert legal representation and guidance to clients throughout the United States. With a commitment to excellence and a passion for justice, the Law Office of Cosmas Onyia is dedicated to achieving the best possible outcomes for each client. Contact us today for a consultation and let us help you navigate the complexities of the legal system.
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Hours open
Monday:
9:00 AM - 5:00 PM
Tuesday:
9:00 AM - 5:00 PM
Wednesday:
9:00 AM - 5:00 PM
Thursday:
9:00 AM - 5:00 PM
Friday:
9:00 AM - 5:00 PM
Saturday:
Closed
Sunday:
Closed
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Reviews
"It will take a full page to write about this attorney Cosmas Onyia whom I found online via google search in December 2021. It was the reviews left by other former clients that made me pick him up to represent me . I reside in state of IA and needed an attorney in AZ. He represented me better than I could have ever imagined. My divorce case started in the state of missouri and I made a huge mistake by allowing my X- to relocate to AZ before divorce was finalized. After she established residency in Az and my two daughters going to school there, she turned around and try to take legal decisions making of my child away from me. Furthermore she falsely accused me of relocating to another state despite the fact that I communicated 60 days before moving via mail, text and email. She also tried to change my kids last names and false allegations of not communicating regarding kids medical appointments. Cosmas Onyia took care of all these and I won every bit of my case. He also cleaned the mess that was pending in missouri after the jurisdiction was moved to AZ Cosmas put my needs first and treated me as a friend rather than a client . My opinions were valued and my doubts were always reassured. My nerves were calmed and the process was always explained. He fought hard for me. Cosmas went above and beyond and did everything he could to ensure a great outcome. I couldn't have asked for a better attorney and I’m very thankful Cosmas ."
"Mr. Onyia is a magnificent lawyer, and I highly recommend him to anyone looking for a dedicated and passionate lawyer. He is eloquent in his delivery, as well as direct and efficient. As a client, I felt prepared and looped in at all times, without needing to chase him for an update. If you’re looking for a lawyer who will give you 110%, look no further, he’s the one."
"Mr. Onyia is an outstanding lawyer! He explained and help walk us through every step. We had lots and lots of questions and he took the time to answer them all either in person, on the phone, or through email. Would highly recommended him. He’s straightforward and reasonably priced. I’m very grateful I found Mr. Onyia."
"This attorney is AMAZING!!! His fees were very reasonable. He doesn't try to nickel and dime his services. He returns phone calls in a timely manner. He's a brilliant family law attorney who is also humble. I received GREAT results hiring him. My only disappointment is that I didn't find him years ago. I would definitely recommend Cosmas for any and all family court issues."
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