These are government administration entities located in the Seine-Maritime department, primarily large public sector organizations. They encompass a range of administrative functions and public services.
Key organizations include DEPARTEMENT DE LA SEINE-MARITIME, which manages social services and infrastructure, and Ville du Havre, responsible for urban planning and cultural activities. Métropole Rouen Normandie provides essential services across 71 communes, while Carsat Normandie handles retirement and occupational health services. Ville de Rouen is a central urban administration, and Le Havre Seine Métropole focuses on economic and environmental innovation.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
DEPARTEMENT DE LA SEINE-MARITIMEseinemaritime.fr
Provides essential social services, manages departmental roads, supports local communities, and promotes education, culture, economic development, and tourism in the region. |
1,450 | |||
| 2 |
Ville du Havrelinktr.ee
local government managing urban planning, environment, port activities, culture, history, tourism, economy, education, sports, and public events |
902 | |||
| 3 |
Métropole Rouen Normandiemetropole-rouen-normandie.fr
Manages 71 communes, providing essential services like water, transport, waste, promoting local development, tourism, and actively addressing climate change. |
886 | |||
| 4 |
Ville de Rouenrouen.fr
Leading urban center in Normandy, Rouen offers a vibrant cultural scene and diverse activities Committed to quality of life, innovation and community engagement |
597 | |||
| 5 |
Carsat Normandiecarsat-normandie.fr
Provides retirement, social action, and occupational health services. Manages substantial retirement payments, social support, and workplace prevention across the region. |
552 | |||
| 6 |
Le Havre Seine Métropolelehavreseinemetropole.fr
This Metropolis aims for excellence through innovation in economy, society, and environment. It focuses on green and blue economy, higher education, and tourism, serving its 275,000 inhabitants. |
527 | |||
| 7 |
Ville de Sotteville-lès-Rouensotteville-les-rouen.fr
Local government promoting environmental sustainability, community participation, economic development, and quality of life through active urban planning and social initiatives. |
206 | |||
| 8 |
Préfecture de la région Normandie et de la Seine-Maritimeseine-maritime.gouv.fr
Official account providing government services and information for the Normandy region and Seine-Maritime department, including social media moderation guidelines. |
180 | |||
| 9 |
CCI Rouen Métropolerouen-metropole.cci.fr
Supporting businesses at every stage from creation to growth to transfer, representing and animating the economic life of 25,000 companies in various sectors |
156 | |||
| 10 |
Ville de Grand Quevillygrandquevilly.fr
Provides local government administration, public services, community development, and support for residents and businesses in Grand Quevilly. |
138 | |||
| 11 |
Assurance Maladie de la Seine-Maritimeameli.fr
A leading social protection organization in the Rouen-Elbeuf-Dieppe area, ensuring universal access to healthcare rights, promoting health preservation, and improving healthcare efficiency |
137 | |||
| 12 |
Ville de Montivilliersville-montivilliers.fr
This company located in Montivilliers, France, focuses on sustainable development, culture, sports, education, and community engagement in a dynamic and inclusive environment |
133 | |||
| 13 |
CCI Normandiecci.fr
Represents business interests to public authorities, promotes enterprise and territorial development for over 140,000 businesses across Normandy. |
126 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 14 |
Ville de Petit-Quevillypetit-quevilly.fr
Official social media channels for local government communication, community engagement, and public information sharing in Petit-Quevilly. |
124 | |||
| 15 |
Cour d'appel de Rouencours-appel.justice.fr
Company operating the court of appeal in Rouen covering Seine-Maritime and Eure, including numerous judicial, proximity, and commercial courts |
120 | |||
| 16 |
Ville de Lillebonnelillebonne.fr
A city located between Le Havre and Rouen, Lillebonne is known for its industrial presence and rich archaeological and historical heritage |
77 | |||
| 17 |
CODAH (Communauté de l'agglomération havraise)
An intercommunal public entity formed in 2001, uniting 275,000 residents across 3 communities for a cohesive urban development project |
73 | |||
| 18 |
Ville de Petit-Cauxpetitcaux.fr
Government administration company based in Normandie, France, focused on serving the community of Petit-Caux Located at 3 Rue du Val des Comtes |
65 | |||
| 19 |
CDG 76 (Centre de Gestion de la fonction publique territoriale de Seine-Maritime)cdg76.fr
Support local governments and public institutions with human resources management, statutory assistance, health, prevention, and employment services in Normandy. |
62 | |||
| 20 |
Urssaf Haute-Normandieurssaf.fr
The company is a network that collects social security contributions, promotes employment policies, prevents payment difficulties, fights against illegal labor, and simplifies social formalities |
56 | |||
| 21 |
Direction Régionale du Service Médical de Normandieameli.fr
The company ensures proper healthcare resource allocation, coordinates patient care, promotes prevention, and combats fraud, serving over 60 million insured individuals |
53 | |||
| 22 |
Ville de Mont-Saint-Aignanmontsaintaignan.fr
A town of 20,000 residents in Rouen, France, Mont-Saint-Aignan offers quality living, universities, businesses, and public services with diverse employment opportunities |
48 | |||
| 23 |
Agglo Fécamp Caux Littoralagglo-fecampcauxlittoral.fr
The company serves a population of 40,000 across 33 municipalities in the Fecamp Caux Littoral region, providing various services and support |
44 | |||
| 24 |
Communauté de communes Falaises du Taloufalaisesdutalou.fr
This company is a community of 24 municipalities in Normandy, Seine-Maritime, with a population of around 24,000 inhabitants |
33 | |||
| 25 |
Assurance Maladie du Havreameli.fr
Working at this company means being part of a team focused on results, using skills to protect the health of over 60 million insured individuals |
21 | |||
| 26 |
COMMUNE DE MONT SAINT AIGNANmontsaintaignan.fr
Organization and promotion of local cultural, social, and recreational events, urban development projects, and community services for residents. |
19 | |||
| 27 |
Ville du Traitletrait.fr
A small town in Normandy, providing a variety of services and amenities to its residents and neighboring communities, while focusing on cultural, social, digital, and ecological transitions |
10 | |||
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 13, 2026.
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