Azy-sur-Marne is located 4 km southwest of Château-Thierry and 20 km east of Montreuil-aux-Lions. It can be accessed by the D969 road from Essômes-sur-Marne in the north through the village then west through the commune and continuing south to Romeny-sur-Marne. There is also a country road going west to Mont de Bonneil. The commune is almost entirely farmland with small forests in the north and west. The commune is within the Appellation d'origine contrôlée zone of Aisne Champagne.

The southern border of the commune consists of the Marne river with no other identifiable watercourses in the commune.

The village was severely damaged in the battles of the Marne in World War I.

This list is incomplete; you can help by adding missing items. (April 2021)

List of Successive Mayors of Azy-sur-Marne

Historical population

Year Pop. ±% p.a. 1793 253 —     1800 266 +0.72% 1806 276 +0.62% 1821 246 −0.76% 1831 259 +0.52% 1836 265 +0.46% 1841 254 −0.84% 1846 245 −0.72% 1851 251 +0.49% 1856 223 −2.34% 1861 315 +7.15% 1866 252 −4.36% 1872 192 −4.43% 1876 191 −0.13% 1881 193 +0.21% 1886 187 −0.63% 1891 199 +1.25% 1896 189 −1.03%	Year Pop. ±% p.a. 1901 194 +0.52% 1906 176 −1.93% 1911 168 −0.93% 1921 160 −0.49% 1926 181 +2.50% 1931 195 +1.50% 1936 167 −3.05% 1946 167 +0.00% 1954 173 +0.44% 1962 200 +1.83% 1968 222 +1.75% 1975 286 +3.69% 1982 326 +1.89% 1990 372 +1.66% 1999 381 +0.27% 2007 374 −0.23% 2012 400 +1.35% 2017 389 −0.56%
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Source: EHESS and INSEE

The commune has two sites that are registered as historical monuments:

• The Church of Saint Felix (12th century)
• The Chateau Park

Other sites of interest

• the Mercier Vineyard for Moët & Chandon Champagne

• Communes of the Aisne department

• Azy-sur-Marne on the old National Geographic Institute website (in French)
• Bell Towers website (in French)
• Azy-sur-Marne on Géoportail, National Geographic Institute (IGN) website (in French)
• Azy on the 1750 Cassini Map

Wikimedia Commons has media related to Azy-sur-Marne.