[3][4] In about 500 BC, the expansion of Roman power and the later foundation and growth of Ancona led to the decline of Numana.

[6] In the Middle Ages the town is referred to under the name Humana Umana in modern Italian spelling and under that name appears in a number of treaties, alliances and other documents.

[6] Numana is a central Adriatic coastal town, which lies at the southern foot of Monte Conero.

The inner part of the territory is mainly hilly and at the mouth of the Musone River, a wet area of significant natural and environmental value.

Taunus, a tourist resort, is situated between Svarchi and Marcelli, and hosts a holiday village and is a residential area of the comune of Numana.