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- Code : 80561
- Nom : Montdidier
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- Assainvillers (80032)
- Ayencourt (80049)
- Becquigny (80074)
- Bouillancourt-la-Bataille (80121)
- Boussicourt (80125)
- Broyes (60111)
- Cantigny (80170)
- Le Cardonnois (80174)
- Courtemanche (80220)
- Domfront (60200)
- Faverolles (80302)
- Fescamps (80306)
- Fignières (80311)
- Fontaine-sous-Montdidier (80326)
- Le Frestoy-Vaux (60262)
- Gratibus (80386)
- Guerbigny (80395)
- Hainvillers (60294)
- Laboissière-en-Santerre (80453)
- Lignières (80478)
- Malpart (80504)
- Marestmontiers (80511)
- Mesnil-Saint-Georges (80541)
- Montdidier (80561)
- Piennes-Onvillers (80623)
- Plainville (60496)
- Remaugies (80667)
- Rollot (80678)
- Royaucourt (60556)
- Rubescourt (80687)
- Villers-Tournelle (80805)
- Warsy (80822)
- Ételfay (80293)