Avant-lès-Marcilly (French pronunciation: [avɑ̃ le maʁsiji], literally Avant near Marcilly) is a commune in the Aube department in the Grand Est region of north-central France.

The D52 come from Soligny-les-Étangs in the west and passes through the village continuing to Ferreux-Quincey in the north-east.

[3] The Ru du Gué de l'Éspine rises near the village and flows west to join the Orvin at Soligny-les-Etangs.

[3] The origins of the commune can be dated back to about the time of construction of the church in the 12th and 13th centuries.

Many older historic remains are still visible in the area such as menhirs (the Marguerite Stone and the Pierre-au-Coq) and dolmens (next to Les Ormeaux).