Postcode areas 91XXX
- Postcode area 91000 Évry
- Postcode area 91070 Bondoufle
- Postcode area 91080 Courcouronnes
- Postcode area 91090 Lisses
- Postcode area 91100 Corbeil-Essonnes
- Postcode area 91120 Palaiseau
- Postcode area 91130 Ris-Orangis
- Postcode area 91140 Villebon-sur-Yvette
- Postcode area 91150 Étampes
- Postcode area 91160 Longjumeau
- Postcode area 91170 Viry-Châtillon
- Postcode area 91180 Saint-Germain-lès-Arpajon
- Postcode area 91190 Gif-sur-Yvette
- Postcode area 91200 Athis-Mons
- Postcode area 91210 Draveil
- Postcode area 91220 Brétigny-sur-Orge
- Postcode area 91230 Montgeron
- Postcode area 91240 Saint-Michel-sur-Orge
- Postcode area 91250 Saint-Germain-lès-Corbeil
- Postcode area 91260 Juvisy-sur-Orge
- Postcode area 91270 Vigneux-sur-Seine
- Postcode area 91280 Saint-Pierre-du-Perray
- Postcode area 91290 Arpajon
- Postcode area 91300 Massy
- Postcode area 91310 Montlhéry
- Postcode area 91320 Wissous
- Postcode area 91330 Yerres
- Postcode area 91340 Ollainville
- Postcode area 91350 Grigny
- Postcode area 91360 Épinay-sur-Orge
- Postcode area 91370 Verrières-le-Buisson
- Postcode area 91380 Chilly-Mazarin
- Postcode area 91390 Morsang-sur-Orge
- Postcode area 91400 Orsay
- Postcode area 91410 Dourdan
- Postcode area 91420 Morangis
- Postcode area 91430 Igny
- Postcode area 91440 Bures-sur-Yvette
- Postcode area 91450 Soisy-sur-Seine
- Postcode area 91460 Marcoussis
- Postcode area 91470 Limours
- Postcode area 91480 Quincy-sous-Sénart
- Postcode area 91490 Milly-la-Forêt
- Postcode area 91510 Lardy
- Postcode area 91520 Égly
- Postcode area 91530 Saint-Chéron
- Postcode area 91540 Mennecy
- Postcode area 91550 Paray-Vieille-Poste
- Postcode area 91560 Crosne
- Postcode area 91570 Bièvres
- Postcode area 91580 Étréchy
- Postcode area 91590 La Ferté Alais
- Postcode area 91600 Savigny-sur-Orge
- Postcode area 91610 Ballancourt-sur-Essonne
- Postcode area 91620 La Ville-du-Bois
- Postcode area 91630 Marolles-en-Hurepoix
- Postcode area 91640 Briis-sous-Forges
- Postcode area 91650 Breuillet
- Postcode area 91660 Méréville
- Postcode area 91670 Angerville
- Postcode area 91680 Bruyères-le-Châtel
- Postcode area 91690 Saclas
- Postcode area 91700 Sainte-Geneviève-des-Bois
- Postcode area 91710 Vert-le-Petit
- Postcode area 91720 Maisse
- Postcode area 91730 Chamarande
- Postcode area 91740 Pussay
- Postcode area 91750 Champcueil
- Postcode area 91760 Itteville
- Postcode area 91770 Saint-Vrain
- Postcode area 91780 Chalo-Saint-Mars
- Postcode area 91790 Boissy-sous-Saint-Yon
- Postcode area 91800 Brunoy
- Postcode area 91810 Vert-le-Grand
- Postcode area 91820 Boutigny-sur-Essonne
- Postcode area 91830 Le Coudray Montceaux
- Postcode area 91840 Soisy-sur-École
- Postcode area 91850 Bouray-sur-Juine
- Postcode area 91860 Épinay-sous-Sénart
- Postcode area 91870 Boissy-le-Sec
- Postcode area 91880 Bouville
- Postcode area 91890 Videlles
- Postcode area 91910 Saint-Sulpice-de-Favières
- Postcode area 91930 Monnerville
- Postcode area 91940 Les Ulis