Postcode areas 89XXX
- Postcode area 89000 Auxerre
- Postcode area 89100 Sens
- Postcode area 89110 Aillant-sur-Tholon
- Postcode area 89113 Fleury-la-Vallée
- Postcode area 89116 Sépeaux
- Postcode area 89120 Charny
- Postcode area 89130 Toucy
- Postcode area 89140 Pont-sur-Yonne
- Postcode area 89144 Ligny-le-Châtel
- Postcode area 89150 Saint-Valérien
- Postcode area 89160 Ancy-le-Franc
- Postcode area 89170 Saint-Fargeau
- Postcode area 89190 Villeneuve-l'Archevêque
- Postcode area 89200 Avallon
- Postcode area 89210 Brienon-sur-Armançon
- Postcode area 89220 Bléneau
- Postcode area 89230 Pontigny
- Postcode area 89240 Pourrain
- Postcode area 89250 Seignelay
- Postcode area 89260 Thorigny-sur-Oreuse
- Postcode area 89270 Vermenton
- Postcode area 89290 Champs-sur-Yonne
- Postcode area 89300 Joigny
- Postcode area 89310 Noyers
- Postcode area 89320 Cerisiers
- Postcode area 89330 Saint-Julien-du-Sault
- Postcode area 89340 Villeneuve-la-Guyard
- Postcode area 89350 Champignelles
- Postcode area 89360 Flogny-la-Chapelle
- Postcode area 89380 Appoigny
- Postcode area 89390 Ravières
- Postcode area 89400 Migennes
- Postcode area 89410 Cézy
- Postcode area 89420 Guillon
- Postcode area 89430 Tanlay
- Postcode area 89440 L'Isle-sur-Serein
- Postcode area 89450 Vézelay
- Postcode area 89460 Cravant
- Postcode area 89470 Monéteau
- Postcode area 89480 Coulanges-sur-Yonne
- Postcode area 89500 Villeneuve-sur-Yonne
- Postcode area 89510 Véron
- Postcode area 89520 Saint-Sauveur-en-Puisaye
- Postcode area 89530 Saint-Bris-le-Vineux
- Postcode area 89550 Héry
- Postcode area 89560 Courson-les-Carrières
- Postcode area 89570 Neuvy-Sautour
- Postcode area 89580 Coulanges-la-Vineuse
- Postcode area 89600 Saint-Florentin
- Postcode area 89630 Quarré-les-Tombes
- Postcode area 89660 Châtel-Censoir
- Postcode area 89690 Chéroy
- Postcode area 89700 Tonnerre
- Postcode area 89710 Senan
- Postcode area 89740 Cruzy-le-Châtel
- Postcode area 89770 Chailley
- Postcode area 89800 Chablis