Fontaine-sur-Ay (Fontaine-sur-Ay)
- commune in Marne, France
- Country:
- Postal Code: 51160
- Coordinates: 49° 4' 55" N, 4° 4' 21" E
- GPS tracks (wikiloc): [Link]
- Area: 7.72 sq km
- Population: 342
- Wikipedia en: wiki(en)
- Wikipedia: wiki(fr)
- Wikidata storage: Wikidata: Q741616
- Wikipedia Commons Category: [Link]
- Freebase ID: [/m/03qd6v3]
- GeoNames ID: Alt: [3017993]
- SIREN number: [215102385]
- BnF ID: [15262861b]
- VIAF ID: Alt: [234768936]
- INSEE municipality code: 51256
Shares border with regions:


Ville-en-Selve
- commune in Marne, France
- Country:
- Postal Code: 51500
- Coordinates: 49° 7' 34" N, 4° 4' 52" E
- GPS tracks (wikiloc): [Link]
- Area: 8.84 sq km
- Population: 271
- Web site: [Link]

Germaine
- commune in Marne, France
- Country:
- Postal Code: 51160
- Coordinates: 49° 6' 52" N, 4° 1' 49" E
- GPS tracks (wikiloc): [Link]
- Area: 14.87 sq km
- Population: 510
- Web site: [Link]

Bisseuil
- former commune in Marne, France
- Country:
- Postal Code: 51150
- Coordinates: 49° 2' 43" N, 4° 5' 18" E
- GPS tracks (wikiloc): [Link]
- AboveSeaLevel: 75 м m
- Area: 10.03 sq km
- Population: 639
- Web site: [Link]

Avenay-Val-d'Or
- commune in Marne, France
- Country:
- Postal Code: 51160
- Coordinates: 49° 4' 9" N, 4° 2' 45" E
- GPS tracks (wikiloc): [Link]
- Area: 12.49 sq km
- Population: 988