License & bar number lookup
Colorado Attorney License Lookup
Search 48,709 attorneys registered with the Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC) by name or bar number. Every record shows the official license status and as-of date.
How to verify a Colorado attorney
- Search the attorney by name or bar number in the search box above — it pulls the official Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC) record.
- Confirm the license status reads "active" (not suspended, disbarred, inactive, or not eligible).
- Check the disciplinary standing — disbarred or suspended is a public record you can see before you hire.
- Cross-check the bar number and admission year against anything the attorney told you.
Colorado attorneys — last name “O”
Active Colorado attorneys with last names starting “O.” Use the search box above for an exact name or bar number.
John Michael O'Banion
CO attorney
- Bar #
- 61975
Gregory M. O'Boyle
Colorado Springs, CO
- Bar #
- 29008
- Firm
- Werner Oaeyboyle Cyboron LLC
Lisa Ann O'Boyle
Colorado Springs, CO
- Bar #
- 47175
- Firm
- City Attorneys Office
Adam Patrick O'Brien
Denver, CO
- Bar #
- 37854
- Firm
- Thompson Coe LLP
Braden J. O'Brien
Denver, CO
- Bar #
- 59450
- Firm
- Husch Blackwell
Bradley J. O'Brien
Denver, CO
- Bar #
- 39017
- Firm
- Obrien Legal Services LLC
Cara Moser O'Brien
Austin, TX
- Bar #
- 53657
Colin Michael O'Brien
Denver, CO
- Bar #
- 41402
- Firm
- Arnold Porter Kaye Scholer LLP
Conor Logan O'Brien
Denver, CO
- Bar #
- 58912
- Firm
- Cox O'Brien
Ellen Kathleen O'Brien
Denver, CO
- Bar #
- 19211
- Firm
- Kutak Rock LLP
Erin B. O'Brien
CO attorney
- Bar #
- 43573
Fern O'Brien
Boulder, CO
- Bar #
- 26912
- Firm
- Obrien Law PC
John Anthony O'Brien
Denver, CO
- Bar #
- 15183
- Firm
- Spencer Fane LLP
John Joseph O'Brien
Denver, CO
- Bar #
- 59900
- Firm
- Armstrong Teasdale LLP
Katherine R. O'Brien
Parker, CO
- Bar #
- 45750
- Firm
- Uhg I LLC
Kathleen Ann O'Brien
Denver, CO
- Bar #
- 43723
- Firm
- Greenberg Traurig LLP
Kevin J. O'Brien
Littleton, CO
- Bar #
- 10635
- Firm
- Obrien & Obrien, P.c.
Lucas E. O'Brien
Denver, CO
- Bar #
- 58014
Mackenzie Stewart O'Brien
Fort Bragg, NC
- Bar #
- 55002
- Firm
- Ides Legal
Matthew C. O'Brien
Denver, CO
- Bar #
- 34698
- Firm
- Alverson Obrien P.c.
Maureen J. O'Brien
Boulder, CO
- Bar #
- 19914
- Firm
- Magnum Law Group LLC
Megan Marie O'Brien
Greeley, CO
- Bar #
- 47785
- Firm
- Colorado State Public Defender
Michael Hawkins O'Brien
Missoula, MT
- Bar #
- 51091
- Firm
- St. Peter O'Brien Law Offices
Michael Joseph O'Brien
Littleton, CO
- Bar #
- 57070
- Firm
- Obrien & Obrien P.c.
Sarah Smyth O'Brien
Denver, CO
- Bar #
- 34172
- Firm
- Butler Snow LLP
Sean Joseph O'Brien
Denver, CO
- Bar #
- 50040
Shauna L. O'Brien
Lafayette, CO
- Bar #
- 46526
- Firm
- O'Brien Law Firm LLC
Susan M. O'Brien
Napa, CA
- Bar #
- 38849
- Firm
- The Doctors Company
Theodore Joseph O'Brien
Denver, CO
- Bar #
- 61623
- Firm
- Taft Law
Susan Mary O'Bryan-Kinney
Aspen, CO
- Bar #
- 37102
- Firm
- Susan Obryan PC
Megan K. O'Byrne
Denver, CO
- Bar #
- 53327
- Firm
- Ogborn Mihm LLP
Aaron Joseph O'Connell
Denver, CO
- Bar #
- 50197
- Firm
- Colorado Department of Law
Ann Kathryn O'Connell
CO attorney
- Bar #
- 34544
Ann Kristin O'Connell
Lafayette, CO
- Bar #
- 39560
Daniel T. O'Connell
Columbine Valley, CO
- Bar #
- 42684
- Firm
- Unitedhealth Group
Elizabeth O'Connell
Denver, CO
- Bar #
- 59204
- Firm
- Redaptive Inc.
Emma Anne O'Connell
Denver, CO
- Bar #
- 61209
- Firm
- Holland & Knight LLP
John T. O'Connell
Aurora, CO
- Bar #
- 42248
- Firm
- Lee Myers and Oconnell LLP
Kellie Noelle O'Connell
Denver, CO
- Bar #
- 61963
- Firm
- Levine Law, LLC
Kevin Gregory O'Connell
Denver, CO
- Bar #
- 26630
Keyonyu X. O'Connell
Denver, CO
- Bar #
- 28840
- Firm
- Law Office of Keyonyu X Oconnell
Lyndsey Mott O'Connell
Denver, CO
- Bar #
- 51255
- Firm
- Lmo Law, LLC D'B'A O'Connell Law Group
Michael R. O'Connell
Crestone, CO
- Bar #
- 34803
- Firm
- Lawforpeople, PC
Patrick Timothy O'Connell
Castle Pines, CO
- Bar #
- 61796
- Firm
- Godfrey Law, P.c.
William Thomas O'Connell
Denver, CO
- Bar #
- 34127
- Firm
- Thompson, Coe, Cousins & Irons, LLP
Alexis O'Connor
CO attorney
- Bar #
- 62398
Christy T. O'Connor
Pebble Beach, CA
- Bar #
- 28779
- Firm
- Ibex
Darren C. O'Connor
Louisville, CO
- Bar #
- 54020
- Firm
- Darren Oconnor Law LLC
Davis Owen O'Connor
Denver, CO
- Bar #
- 10272
Dennis Patrick O'Connor
Sacramento, CA
- Bar #
- 16990
Gregory W. O'Connor
CO attorney
- Bar #
- 15445
Jaclyn Ann O'Connor
Denver, CO
- Bar #
- 54808
- Firm
- Office of the State Court Administrator
James Francis O'Connor
Golden, CO
- Bar #
- 28780
- Firm
- Colo State Public Defender
Kip O'Connor
Glenwood Springs, CO
- Bar #
- 36407
- Firm
- Kip Oconnor II Esq.
Michael A. O'Connor
Littleton, CO
- Bar #
- 16133
Ryan Leonard O'Connor
CO attorney
- Bar #
- 39530
Shane Patrick O'Connor
Boulder, CO
- Bar #
- 54127
- Firm
- Berg Hill Greenleaf Ruscitti LLP
Shannon Molly O'Connor
Brighton, CO
- Bar #
- 36990
- Firm
- 17th Judicial District
Steven Charles O'Connor
Herndon, VA
- Bar #
- 49087
- Firm
- Paragon Systems Inc.
Terrence Patrick O'Connor
Edwards, CO
- Bar #
- 9574
- Firm
- Heckman Oconnor PC
Disciplinary actions
See Colorado attorney disciplinary actions (945 attorneys currently disbarred or suspended of record).
Frequently asked questions
How do I check if a lawyer is licensed in Colorado?
Search their name or bar number in the lookup above. It returns the official Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC) record, including current license status and admission year. If no record comes back, the person may not be licensed in Colorado.
How many attorneys are registered in Colorado?
48,709 attorneys are registered with the Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC), and 29,878 are on active status. Every record here shows the official license status and as-of date.
Is Colorado attorney discipline public?
Yes. License status, including disbarment and suspension of record, is public information published by the Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC). 945 Colorado attorneys are currently disbarred or suspended of record.
What is a bar number?
A bar number is the unique ID the Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC) assigns to each admitted attorney. It is the most reliable way to confirm you are looking at the right person, especially for common names.
Does this cost anything?
No. Looking up a Colorado attorney's license and disciplinary standing on this site is free and requires no account.
Data sources & last updated
- Licensing roster & status: Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC). Published roster figure (OARC 2024 Annual Report).
- Resident-attorney benchmark: ABA National Lawyer Population Survey 2024.
- Data on this page as of 2026-06-14 (last roster ingest).
This site republishes official public records and is not legal advice, a lawyer referral service, or a consumer reporting agency. Information here may not be used to make decisions about employment, tenancy, or credit (FCRA). Records are shown as published by their official sources and may contain errors or be out of date; consult the linked official source to verify. To correct or dispute a record, contact the licensing authority of record.