# Saclay

> commune in Essonne, France

**Wikidata**: [Q262710](https://www.wikidata.org/wiki/Q262710)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Saclay)  
**Source**: https://4ort.xyz/entity/saclay

## Summary
Saclay is a commune located in the Essonne department of France, situated within the Paris-Saclay scientific and technological cluster. It serves as a critical hub for research and higher education, hosting major institutions such as the CEA Paris-Saclay laboratory and the École normale supérieure Paris-Saclay. The commune is characterized by its integration into a dense network of academic and industrial entities, including the broader Paris Saclay research-intensive business cluster.

## Key Facts
- **Entity Type**: Commune in the Essonne department of France.
- **Location**: Coordinates 48.730833333333 N, 2.1733333333333 E.
- **Administrative Division**: Part of the arrondissement of Palaiseau (established 1962-11-09) and the Essonne department (established 1968-01-01).
- **Population Data**: Recorded figures include 3,788; 443; 3,905; 4,021; 4,029; 4,098; 4,256; 4,261; 4,323; 4,380; and 4,437.
- **Official Website**: https://www.saclay.fr/
- **Wikipedia Title**: Saclay
- **Wikidata Description**: Commune in Essonne, France.
- **Sitelink Count**: 41 language links.
- **Parent Cluster**: Part of the Paris Saclay research-intensive and business cluster (inception: 1950).
- **Key Institutions**: Hosts CEA Paris-Saclay (inception: 1949) and École normale supérieure Paris-Saclay (inception: 1912).
- **National Context**: Located in France, a country with origins tracing to West Francia (843 AD) and the First French Empire (1804).
- **Regional Context**: Essonne is a French department; Palaiseau is the specific arrondissement.
- **Cultural Context**: The commune exists within a national framework that includes the "Concours des villes et villages fleuris" (founded 1959).

## FAQs
**What is the administrative status and location of Saclay?**
Saclay is a commune situated in the Essonne department within the Île-de-France region of France. It falls under the jurisdiction of the arrondissement of Palaiseau, which was established in November 1962.

**Which major research and educational institutions are located in Saclay?**
The commune hosts the CEA Paris-Saclay, the headquarters of the Commissariat à l'énergie atomique founded in 1949, and the École normale supérieure Paris-Saclay, a prestigious Grande École established in 1912. These institutions operate within the broader Paris Saclay research-intensive cluster that began forming around 1950.

**How does Saclay fit into the broader French territorial organization?**
As a commune, Saclay represents the fundamental territorial subdivision of France, a system dating back to 1789. It is part of the Essonne department, created in 1968, and is located in Western Europe within the country of France.

**What historical context defines the region where Saclay is located?**
The commune is located in France, a nation whose statehood origins are linked to the Treaty of Verdun in 843 AD and the First French Empire in 1804. The specific administrative structures, such as the department of Essonne and the arrondissement of Palaiseau, were formalized in the mid-20th century.

## Why It Matters
Saclay matters because it functions as a central node in one of the world's most significant scientific and technological ecosystems, the Paris-Saclay cluster. By hosting the CEA Paris-Saclay, a major government research institute founded in 1949, the commune contributes directly to national and global advancements in atomic energy, neuroscience, and physics. Its presence of elite educational institutions like the École normale supérieure Paris-Saclay ensures a continuous pipeline of high-level research and innovation. The commune's integration into the Paris Saclay business cluster (inception 1950) facilitates the translation of academic research into industrial application, making it a vital engine for the French economy and scientific prestige.

## Notable For
- **Hosting CEA Paris-Saclay**: Serving as the location for the laboratory and headquarters of the Commissariat à l'énergie atomique.
- **Academic Excellence**: Home to the École normale supérieure Paris-Saclay, a leading French Grande École.
- **Cluster Integration**: A key component of the Paris Saclay research-intensive and business cluster established in 1950.
- **Administrative History**: Located within the arrondissement of Palaiseau (1962) and the Essonne department (1968).
- **Demographic Growth**: Exhibiting a population range from 443 to 4,437 across recorded data points.
- **Scientific Heritage**: Part of a region with deep historical roots in French statehood dating back to 843 AD.
- **Competitive Recognition**: Situated in a country that participates in the "Concours des villes et villages fleuris," a national contest for floral decoration.

## Body

### Geography and Administration
Saclay is a commune located in the Essonne department of France. Its precise geographic coordinates are latitude 48.730833333333 and longitude 2.1733333333333. Administratively, it belongs to the arrondissement of Palaiseau, which was established on November 9, 1962. The Essonne department itself was created on January 1, 1968. As a commune, it represents the standard territorial subdivision for municipalities in France, a system originating in 1789. The commune is part of the larger country of France, which spans Western Europe and overseas territories in the Americas, Africa, and Oceania.

### Scientific and Educational Ecosystem
The commune is a pivotal location for the Paris-Saclay scientific and technological cluster, which has its inception recorded as 1950. A primary anchor institution is CEA Paris-Saclay, the laboratory and headquarters of the Commissariat à l'énergie atomique (CEA). This entity was founded in 1949, with a declaration of public utility dating to December 11, 1946. CEA Paris-Saclay operates as a research institute and government agency, hosting specialized units such as the Lasers, Interactions and Dynamics Laboratory, the Institut des neurosciences Paris Saclay, Systèmes Membranaires, Photobiologie, and Stress et Détoxication. It maintains affiliations with the National Center for Scientific Research (CNRS), HEC Paris, the Institut des Hautes Études Scientifiques, ComUE Paris-Saclay University, and École polytechnique.

Another major educational entity is the École normale supérieure Paris-Saclay, a French Grande École with an inception date of 1912. This institution is part of the Paris-Saclay University network and contributes to the cluster's focus on high-level research and education. The presence of these institutions transforms Saclay into a dense hub of intellectual activity, linking government research, private industry, and academic excellence.

### Demographics and Data
Population statistics for Saclay vary across different recorded periods, showing a range of figures including 3,788, 443, 3,905, 4,021, 4,029, 4,098, 4,256, 4,261, 4,323, 4,380, and 4,437. These figures reflect the commune's demographic profile over time. The commune is part of the broader French demographic landscape, where the national population was estimated at 68,605,616 in 2025. The commune operates within the French administrative framework, which includes a retirement age of 62 and a marriageable age of 18.

### Infrastructure and Connectivity
Saclay is connected to the digital and physical infrastructure of France. The commune's official website is https://www.saclay.fr/. It falls under the national calling code +33 and uses the .fr internet top-level domain. The electrical grid in the region operates at 230 volts and 50 Hz, utilizing Europlug and Type E plugs. Traffic regulations follow the national standard of driving on the right side of the road. The commune is part of the time zone system used in metropolitan France, which observes Central European Time (UTC+01:00) and Central European Summer Time (UTC+02:00).

### Historical and Cultural Context
The commune exists within the historical continuum of France, a nation whose origins are traced to the Treaty of Verdun in 843 AD, which established West Francia, and the proclamation of the First French Empire in 1804. The local administrative structures, such as the department of Essonne and the arrondissement of Palaiseau, reflect the modernization of French governance in the 20th century. Culturally, the commune is part of a nation known for its motto "Liberté, égalité, fraternité" and its national anthem "La Marseillaise." The region participates in national traditions such as the "Concours des villes et villages fleuris," an annual contest founded in 1959 to recognize floral decoration in French towns and villages.

### Institutional Relationships and Networks
Saclay is deeply integrated into a network of national and international organizations. The CEA Paris-Saclay, a key entity within the commune, is affiliated with the Alternative Energies and Atomic Energy Commission (CEA) and the National Center for Scientific Research (CNRS). It also maintains ties with major higher education institutions including HEC Paris, the Institut des Hautes Études Scientifiques, and École polytechnique. The broader Paris Saclay cluster serves as a business and research-intensive hub, fostering collaboration between these entities. The commune's location in Essonne places it within a department that is part of the Île-de-France region, a central area for French economic and political activity.

### Technical Identifiers and Metadata
For data management and identification purposes, the commune and its institutions are associated with specific identifiers. The CEA Paris-Saclay entity holds the ROR ID 01fv25t22, the ISIL code FR-912725101, and the ISNI 0000000098532953. It is also identified by the VIAF number 146009816 and the Freebase ID /m/0h55h3s. The grid identifier for the research center is grid.462763.2. The commune itself has a Wikidata sitelink count of 41 and is described as a "commune in Essonne, France." The Wikipedia title for the entity is "Saclay." These identifiers facilitate the accurate linking of data across academic, governmental, and public information systems.

## References

1. French National Directory of Representatives
2. Virtual International Authority File
3. BnF authorities
4. dataset of postal codes in France. 2018
5. [Code officiel géographique](https://www.insee.fr/fr/information/4316069)
6. [Source](https://data.iledefrance.fr/explore/dataset/villes_idf_label_vvf/download?format=csv)
7. répertoire géographique des communes
8. Freebase Data Dumps. 2013
9. Czech National Authority Database
10. Annuaire de service-public.fr
11. MusicBrainz
12. Recensement de la population 2015. National Institute of Statistics and Economic Studies. 2017
13. Populations légales 2016
14. Populations légales 2017
15. Populations légales 2018
16. Populations légales 2019
17. Populations légales 2020
18. Populations légales 2021
19. Populations de référence 2022
20. Populations de référence 2023
21. [Code officiel géographique](https://www.insee.fr/fr/information/3363419)
22. National Institute of Statistics and Economic Studies
23. GeoNames
24. [répertoire géographique des communes. 2015](https://wxs-telechargement.ign.fr/83edtfdyqte031y0ra49d2e3/telechargement/inspire/RGC-2015-01$RGC2015/file/RGC2015.7z)
25. [2016](https://data.geopf.fr/telechargement/download/GEOFLA/GEOFLA_2-2_COMMUNE_SHP_LAMB93_FXX_2016-06-28/GEOFLA_2-2_COMMUNE_SHP_LAMB93_FXX_2016-06-28.7z)
26. [Code officiel géographique. 2017](https://www.insee.fr/fr/information/2560698)
27. National Library of Israel Names and Subjects Authority File