This commune covers an area of 3.4km² and has nearly 160 inhabitants who are known as ‘Asnacussiens’. It is located 20km south of Troyes. Reached via the D25 or the D123, it is 10 km from junction 21 (Saint-Thibault) of the A5 from Paris.

The village of Assenay is spread out through the woods and fields, and has alternating views into the distance and of the surrounding small valleys. Its associations and a few businesses make it a lively place, and it is possible to stay here in charming B&Bs. Assenay has a mix of modern houses and typical rural cottages with half-timbering or exposed brickwork. Farmhouses and working farms are visible throughout Assenay's Champenois countryside.