# Aulnay-sur-Mauldre

> commune in Yvelines, France

**Wikidata**: [Q273124](https://www.wikidata.org/wiki/Q273124)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Aulnay-sur-Mauldre)  
**Source**: https://4ort.xyz/entity/aulnay-sur-mauldre

## Summary

Aulnay-sur-Mauldre is a commune located in the Yvelines department in the Île-de-France region of northern France, situated along the Mauldre river. As part of the arrondissement of Mantes-la-Jolie, it represents one of the numerous municipalities that compose the French administrative landscape, characterized by its position in the western suburbs of Paris.

## Key Facts

- **Official Name**: Aulnay-sur-Mauldre
- **Alias**: Aulnay
- **Country**: France
- **Region**: Île-de-France
- **Department**: Yvelines (since 1968)
- **Former Department**: Seine-et-Oise (1790-1968)
- **Arrondissement**: Mantes-la-Jolie
- **Administrative Status**: Commune of France (municipal territorial subdivision since 1789)
- **Geographic Feature**: Located on the Mauldre river
- **Coordinates**: Latitude 48.928888888889, Longitude 1.8402777777778
- **Website**: http://www.aulnay-sur-mauldre.fr
- **Population**: Approximately 1,154 to 1,180 residents (varying across recent years)
- **Wikipedia Title**: Aulnay-sur-Mauldre
- **Wikidata Description**: commune in Yvelines, France

## FAQs

**What region and department is Aulnay-sur-Mauldre located in?**

Aulnay-sur-Mauldre is situated in the Yvelines department, which is part of the Île-de-France region that encompasses Paris and its surrounding suburbs. The commune belongs to the arrondissement of Mantes-la-Jolie.

**What is the administrative history of Aulnay-sur-Mauldre?**

The commune's administrative boundaries have evolved alongside French departmental reorganization. Prior to 1968, Aulnay-sur-Mauldre was part of the Seine-et-Oise department, which was dissolved on January 1, 1968, with its territory divided to create the new Yvelines department among others. The commune system itself dates back to 1789 in France.

**What geographical features define Aulnay-sur-Mauldre?**

Aulnay-sur-Mauldre is positioned along the Mauldre river, a waterway in France. The commune's coordinates place it at approximately 48.93° north latitude and 1.84° east longitude, situating it in the western part of the Île-de-France region.

**What is the population of Aulnay-sur-Mauldre?**

The commune has a modest population of approximately 1,140 to 1,180 residents based on recorded data, placing it among the smaller rural-commuter municipalities in the Yvelines department.

**What type of administrative division is a commune in France?**

A commune is the smallest administrative territorial division in France, functioning as a municipality. There are over 34,000 communes in France, each serving as the fundamental unit of local government, with their origins dating back to the French Revolution in 1789.

## Why It Matters

Aulnay-sur-Mauldre exemplifies the network of smaller communes that form the demographic and administrative fabric of the Yvelines department. While not a major urban center, the commune plays a role in the broader Île-de-France regional ecosystem, contributing to the diverse mix of urban, suburban, and rural municipalities that characterize the area surrounding Paris. Its location along the Mauldre river connects it to local environmental and geographical systems, while its position within the arrondissement of Mantes-la-Jolie ties it to regional administrative structures. The commune's existence since at least the departmental reorganization of 1968 demonstrates the stability of French municipal boundaries and the continuity of local governance structures established during the revolutionary period.

## Notable For

- **River Location**: Situated along the Mauldre river, connecting it to local hydrological systems
- **Historical Departmental Transition**: Part of the former Seine-et-Oise department before the 1968 reorganization that created Yvelines
- **Commune System Heritage**: Represents the French municipal structure dating to 1789
- **Île-de-France Context**: Located in the region containing Paris, one of Europe's major metropolitan areas
- **Arrondissement Membership**: Part of Mantes-la-Jolie, an important administrative center in the western Yvelines

## Body

### Geography and Location

Aulnay-sur-Mauldre is positioned in the Yvelines department within the Île-de-France region of northern France. The commune lies at coordinates 48.928888888889° north latitude and 1.8402777777778° east longitude. Its position along the Mauldre river defines one of its key geographical characteristics, connecting the municipality to the local water systems that traverse the Yvelines territory. The commune sits in the western portion of the Île-de-France region, which encompasses Paris and its surrounding departments, making it part of one of Europe's most populous metropolitan areas.

### Administrative History

The administrative status of Aulnay-sur-Mauldre reflects the broader evolution of French departmental organization. Prior to 1968, the commune belonged to the department of Seine-et-Oise, which was established in 1790 during the early years of the French Revolution. On January 1, 1968, Seine-et-Oise was dissolved as part of a major departmental reorganization, and its territory was divided to create several new departments, including Yvelines. This transformation marked a significant administrative shift for Aulnay-sur-Mauldre, placing it within the newly established Yvelines department while maintaining its status as a commune.

The commune system itself represents one of the foundational elements of French local government, originating from the revolutionary period of 1789 when the old administrative divisions were replaced with a uniform municipal structure. Today, France comprises over 34,000 communes, each serving as the basic unit of local administration, and Aulnay-sur-Mauldre participates in this centuries-old tradition of municipal governance.

### Regional Context

Aulnay-sur-Mauldre belongs to the arrondissement of Mantes-la-Jolie, an administrative division within the Yvelines department. The arrondissement serves as an intermediate level of administration between the department and the commune, coordinating regional services and administrative functions. Mantes-la-Jolie itself functions as a subprefecture, representing a significant administrative center for the surrounding municipalities.

The Yvelines department, created in 1968, is one of the five original departments of the Île-de-France region. The department is named after the Yvette river and encompasses a mix of urban, suburban, and rural territories west of Paris. The region as a whole is characterized by its dense population, extensive transportation networks, and significant economic activity, with Yvelines being particularly known for its presence of technology companies, research facilities, and historical châteaux.

### Demographics and Community

Based on available population data, Aulnay-sur-Mauldre maintains a population of approximately 1,140 to 1,180 residents across recorded years. This places the commune among the smaller municipalities in the Yvelines department, characteristic of rural-commuter communities that maintain agricultural heritage while benefiting from proximity to larger urban centers. The population figures demonstrate relative stability, with minor fluctuations reflecting broader demographic trends in the Île-de-France region's smaller municipalities.

### Infrastructure and Access

The commune maintains a municipal website accessible at http://www.aulnay-sur-mauldre.fr, providing information about local services, administrative procedures, and community matters to residents and visitors. This digital presence reflects the modern administrative capabilities of even smaller French municipalities, ensuring transparency and communication with the local population.

### Related Administrative Entities

Aulnay-sur-Mauldre exists within a hierarchy of French administrative divisions: it is part of the commune of France system, which serves as the lowest level of territorial administration; it belongs to the Yvelines department, which is itself part of the Île-de-France region; and it falls within the arrondissement of Mantes-la-Jolie. The Mauldre river, which flows through the commune, represents a geographical feature that connects Aulnay-sur-Mauldre to the broader environmental landscape of the Yvelines department, joining other watercourses that drain the Île-de-France region toward the Seine river system.

## References

1. [Source](https://www.data.gouv.fr/fr/datasets/5c34c4d1634f4173183a64f1/)
2. French National Directory of Representatives
3. Virtual International Authority File
4. BnF authorities
5. dataset of postal codes in France. 2018
6. INSEE code
7. [Source](http://archives.yvelines.fr)
8. répertoire géographique des communes
9. Freebase Data Dumps. 2013
10. Annuaire de service-public.fr
11. Recensement de la population 2015. National Institute of Statistics and Economic Studies. 2017
12. Populations légales 2016
13. Populations légales 2017
14. Populations légales 2018
15. Populations légales 2019
16. Populations légales 2020
17. Populations légales 2021
18. Populations de référence 2022
19. Populations de référence 2023
20. [Code officiel géographique](https://www.insee.fr/fr/information/3363419)
21. National Institute of Statistics and Economic Studies
22. GeoNames
23. [répertoire géographique des communes. 2015](https://wxs-telechargement.ign.fr/83edtfdyqte031y0ra49d2e3/telechargement/inspire/RGC-2015-01$RGC2015/file/RGC2015.7z)
24. [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)
25. [Code officiel géographique. 2017](https://www.insee.fr/fr/information/2560698)