{{Infobox French commune |name = Herblay-sur-Seine |commune status = Commune |image = HerblaySeineEglise.JPG |caption = The old village of Herblay, alongside the River Seine |image coat of arms = Blason ville fr Herblay (Val-d'Oise).svg |map size = 270px |adjustable map = Herblay_map.png |map caption = Location (in red) within Paris inner and outer suburbs |demonym = Herblaysiens |coordinates = {{coord|48.9908|2.1664|format=dms|display=inline,title}} |arrondissement = Argenteuil |canton = Herblay-sur-Seine |intercommunality = CA Val Parisis |mayor = Philippe Rouleau (LR)<ref>{{cite web|title=Répertoire national des élus: les maires|url=https://www.data.gouv.fr/fr/datasets/r/2876a346-d50c-4911-934e-19ee07b0e503|website=data.gouv.fr, Plateforme ouverte des données publiques françaises|date=2 December 2020|language=fr}}</ref> |term = 2020&ndash;2026 |elevation min m = 20 |elevation max m = 91 |area km2 = 12.74 |population = {{France metadata Wikidata|population_total}} |population date = {{France metadata Wikidata|population_as_of}} |population footnotes = {{France metadata Wikidata|population_footnotes}} |INSEE = 95306 |postal code = 95220 |website = {{url|https://www.herblaysurseine.fr}} }}

'''Herblay-sur-Seine''' ({{IPA|fr|ɛʁblɛ syʁ sɛn}}; {{literal translation}} 'Herblay-on-Seine'; before 2018: '''Herblay''')<ref>[https://www.legifrance.gouv.fr/eli/decret/2018/11/5/TERB1825266D/jo/texte Décret n° 2018-956] 5 November 2018 {{in lang|fr}}</ref> is a commune in the Val-d'Oise department in the Île-de-France region in Northern France. It is located {{convert|20.2|km|mi|abbr=on}} from the centre of Paris, in its northwestern outer suburbs, on the departmental border with Yvelines. It is twinned with Yeovil, England.

==Geography== ===Climate===

Herblay-sur-Seine has an oceanic climate (Köppen climate classification ''Cfb''). The average annual temperature in Herblay-sur-Seine is {{cvt|11.8|C}}. The average annual rainfall is {{cvt|612.5|mm}} with October as the wettest month. The temperatures are highest on average in July, at around {{cvt|19.7|C}}, and lowest in December, at around {{cvt|4.6|C}}. The highest temperature ever recorded in Herblay-sur-Seine was {{cvt|40.1|C}} on 6 August 2003; the coldest temperature ever recorded was {{cvt|-13.5|C}} on 7 January 2009.

{{Weather box |width=auto |collapsed=y |location = Herblay-sur-Seine (1981−2010 normals, extremes 1989−2014) |single line = Y |metric first = Y |Jan record high C = 16.0 |Feb record high C = 20.5 |Mar record high C = 24.6 |Apr record high C = 27.0 |May record high C = 32.5 |Jun record high C = 36.8 |Jul record high C = 37.2 |Aug record high C = 40.1 |Sep record high C = 32.5 |Oct record high C = 29.4 |Nov record high C = 19.0 |Dec record high C = 17.7 |Jan record low C = -13.5 |Feb record low C = -12.8 |Mar record low C = -9.7 |Apr record low C = -3.0 |May record low C = 0.3 |Jun record low C = 2.1 |Jul record low C = 5.9 |Aug record low C = 5.2 |Sep record low C = 2.3 |Oct record low C = -3.5 |Nov record low C = -9.9 |Dec record low C = -11.6 |Jan high C = 7.2 |Feb high C = 8.8 |Mar high C = 12.8 |Apr high C = 15.4 |May high C = 19.8 |Jun high C = 22.7 |Jul high C = 25.1 |Aug high C = 25.1 |Sep high C = 21.2 |Oct high C = 16.1 |Nov high C = 10.7 |Dec high C = 7.0 |year high C = 16.0 |Jan mean C = 4.6 |Feb mean C = 5.5 |Mar mean C = 8.6 |Apr mean C = 10.6 |May mean C = 14.6 |Jun mean C = 17.4 |Jul mean C = 19.7 |Aug mean C = 19.6 |Sep mean C = 16.1 |Oct mean C = 12.4 |Nov mean C = 7.7 |Dec mean C = 4.6 |year mean C = 11.8 |Jan low C = 2.1 |Feb low C = 2.2 |Mar low C = 4.3 |Apr low C = 5.8 |May low C = 9.5 |Jun low C = 12.2 |Jul low C = 14.2 |Aug low C = 14.1 |Sep low C = 11.1 |Oct low C = 8.5 |Nov low C = 4.7 |Dec low C = 2.1 |year low C = 7.6 |precipitation colour = green |Jan precipitation mm = 45.3 |Feb precipitation mm = 44.2 |Mar precipitation mm = 45.2 |Apr precipitation mm = 50.7 |May precipitation mm = 53.2 |Jun precipitation mm = 51.8 |Jul precipitation mm = 54.6 |Aug precipitation mm = 51.7 |Sep precipitation mm = 42.8 |Oct precipitation mm = 61.3 |Nov precipitation mm = 51.4 |Dec precipitation mm = 60.3 |year precipitation mm = 612.5 |unit precipitation days = 1.0 mm |Jan precipitation days = 9.0 |Feb precipitation days = 9.3 |Mar precipitation days = 9.9 |Apr precipitation days = 10.0 |May precipitation days = 9.0 |Jun precipitation days = 8.6 |Jul precipitation days = 7.9 |Aug precipitation days = 8.1 |Sep precipitation days = 8.1 |Oct precipitation days = 9.6 |Nov precipitation days = 10.8 |Dec precipitation days = 11.1 |year precipitation days = 111.0 |source 1 = Météo-France<ref>{{cite web | url = https://donneespubliques.meteofrance.fr/FichesClim/FICHECLIM_95306001.pdf | title=Fiche Climatologique Statistiques 1981-2010 et records | language = fr | publisher = Météo-France | access-date = August 28, 2022}}</ref>}}

==Demographics== {{Historical populations | align = none | cols = 2 | percentages = pagr | source = EHESS<ref name=ehess>{{Cassini-Ehess|16978|Herblay}}</ref> and INSEE (1968–2023)<ref name=pophist>[https://www.insee.fr/fr/statistiques/8643952?geo=COM-95306#tableau-POPREF_G1 Population municipale entre 1968 et 2023], INSEE</ref> | graph-pos = bottom |1793 |1524 |1800 |1364 |1806 |1377 |1821 |1396 |1831 |1564 |1836 |1576 |1841 |1574 |1846 |1605 |1851 |1582 |1856 |1592 |1861 |1641 |1866 |1611 |1872 |1699 |1876 |1631 |1881 |1625 |1886 |1681 |1891 |1798 |1896 |2033 |1901 |1990 |1906 |2190 |1911 |2339 |1921 |2898 |1926 |4258 |1931 |5471 |1936 |5800 |1946 |5937 |1954 |7452 |1962 |10220 |1968 |12264 |1975 |16397 |1982 |19647 |1990 |22135 |1999 |23083 |2007 |26137 |2012 |26944 |2017 |29342 |2023 |31779 }}

==Transport== Herblay-sur-Seine is served by Herblay station on the Transilien Paris-Saint-Lazare suburban rail line.

==Education== Schools in Herblay-sur-Seine:<ref>"[http://herblay.fr/mon-quotidien/education/la-liste-des-ecoles Etablissements scolaires]." Herblay. Retrieved on September 6, 2016.</ref> * Six primary school : Jean-Louis Etienne, Jean Moulin, Buttes Blanches, Chênes, Tournade, Saint-Exupéry * Seven public preschools (''maternelles''): Jean Moulin, Buttes Blanches, Chênes, Tournade, Saint-Exupéry, Louis Pergaud, Jean Jaurès * Seven public elementary schools: Jean Moulin, Pasteur, Buttes Blanches, Chênes, Saint Exupéry, Marie Curie, Jean Jaurès * Two public junior high schools (''collèges''): Georges Duhamel and Jean Vilar * Lycée Montesquieu (public senior high school/sixth-form college) * Three private schools: Sainte Jeanne d'Arc, Montaigne, Léonard de Vinci

The commune has a municipal library.<ref>[http://herblay.c3rb.org/opac_net/ Home page]. Herblay library. Retrieved on September 6, 2016.</ref>

==People from Herblay== :''See :Category:People from Herblay''

* Pierre Pincemaille (1956-2018), musician and organist.

==See also== *Communes of the Val-d'Oise department

==References== {{reflist}}

==External links== * [http://www.herblaysurseine.fr/ Official website] {{in lang|fr}} * [https://web.archive.org/web/20061108201712/http://www.chambres-hotes-iledefrance.com/English/pictures_paradise.htm Pictures Quais de Seine] {{in lang|en}} * [http://www.universia.fr/ Universite inter-Ages Herblay] {{in lang|fr}} *{{Search Mérimée|95306}} *[https://uniondesmairesduvaldoise.fr Association of Mayors of the Val d'Oise] {{in lang|fr}}

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{{Commons category|Herblay-sur-Seine}}

{{Paris Metropolitan Area}} {{Val-d'Oise communes}}

{{Authority control}}

Category:Communes of Val-d'Oise

{{ValOise-geo-stub}}