20 leading constitutional law lawyers in France in 2026
Impact Lawyers' editorial selection brings together twenty professionals with particularly significant experience in constitutional law in France. Lawyers are listed alphabetically by surname: the table order does not establish internal positions or identify one professional as superior to another.
| Lawyer | Firm | Main profile |
|---|---|---|
| Anthony Lerebourg | Independent practice | Constitutional review and public litigation |
| Christine Le Bihan-Graf | Hogan Lovells Cadwalader | Constitutional litigation and fundamental rights |
| Christophe Cabanes | Cabanes Avocats | Constitutional review and public litigation |
| David Préat | Clifford Chance | Constitutional litigation and fundamental rights |
| Emmanuel Glaser | Fréget Glaser & Associés | Constitutional review and public litigation |
| Emmanuel Piwnica | SCP Piwnica & Molinié | Constitutional review and public litigation |
| Emmanuelle Mignon | August Debouzy | Constitutional review, public freedoms and supreme courts |
| Frédéric Mion | Darrois Villey Maillot Brochier | Public law, regulation and institutions |
| Frédéric Salat-Baroux | Weil Gotshal & Manges | Constitutional review, public freedoms and supreme courts |
| Henri Savoie | Darrois Villey Maillot Brochier | Public law, regulation and institutions |
| Jean Latournerie | Latournerie Wolfrom Avocats | Constitutional review, public freedoms and supreme courts |
| Louis Boré | Boré, Salve de Bruneton & Mégret | Constitutional litigation and fundamental rights |
| Marc Fornacciari | Dentons | Public law, regulation and institutions |
| Patrice Spinosi | SCP Spinosi | Constitutional review and public litigation |
| Philippe Delelis | Jones Day | Constitutional review, public freedoms and supreme courts |
| Raphaële Bouniol-Brochier | SCP Le Guerer, Bouniol-Brochier, Lassalle-Byhet | Constitutional review, public freedoms and supreme courts |
| Romaric Lazerges | A&O Shearman | Public law, regulation and institutions |
| Thierry Laloum | Willkie Farr & Gallagher | Constitutional litigation and fundamental rights |
| Thomas Courtel | Gide Loyrette Nouel | Constitutional litigation and fundamental rights |
| Vincent Brenot | August Debouzy | Public law, regulation and institutions |
How the ranking was prepared
This selection was built from scratch through Impact Lawyers’ own editorial review of professional and public information available through 2026. It does not reproduce or adapt the order of third-party directories, awards or rankings. Profiles were identified and cross-checked using current professional biographies, official law-firm information, publicly verifiable matters and transactions, publications, institutional and academic activity and international experience.
For this practice area, particular attention was paid to constitutional litigation, fundamental rights, constitutional review, public freedoms and institutional matters.
The editorial assessment combines five dimensions:
- Depth, continuity and genuine specialisation in the practice: 30%.
- Complexity and relevance of publicly verifiable matters, transactions or responsibilities: 25%.
- Technical command and ability to handle complex matters within the specialty: 20%.
- Professional leadership, independent judgement and ability to lead significant mandates: 15%.
- International profile and doctrinal, academic or institutional contribution: 10%.
Impact Lawyers' own editorial approach
Inclusion does not depend on firm size, media visibility or presence in other rankings. The selection is intended to reflect different practice models, combining major firms, specialist boutiques and professionals with a particularly distinctive individual track record. The apparent number of wins, transactions or clients is not used as an automatic measure because public information is uneven and many matters remain confidential.
How to interpret the selection
This ranking is an editorial snapshot of the market based on public information available in 2026. It does not measure fees, guarantee outcomes or claim that any included professional is the right choice for every matter. The choice of counsel should take into account the precise specialty, potential conflicts of interest, jurisdiction, availability, language, budget and relationship of trust.
Professional careers and firm structures can change. Future editions should therefore verify partner moves, new firms, changes of role and potential incompatibilities before publication.
