Today, it follows a strong demographic increase from later years, and the development is continuing on the low hills that rise immediately inland from the Statale 16 Road; the Corva and Cretarola districts are the highest point of the city's territory, with interesting sea views.

From some excavations within the commune's area many important archaeological finds were discovered, which confirmed the presence of Etruscan burial sites that date back to 8th century B.C.. From renaissance maps there are annotations of a small village on the coast, with the name Porto San Lupidio, with a sea teeming with fish and a little away from Castrum Castri, now known as Fermo.

In those days, torrential rains swelled the beds of the rivers Chienti and Tenna and the absolute lack of a sanitation network worsened the problem.

In less than a day a serious quantity of mud and water overran the streets, obstructing the arrival of scarce assistance and destroying many small homes and the harvests.

It is a Samnite shield; a top band shows the sea, with a boat sailing very simply (it represents the work of fishermen) and the sun.

On the lower band, on the red bottom the worker bee is depicted, to signify the laborious nature of Porto Sant'Elpidio's inhabitants.

At the beginning of the 19th century, the construction of the Concimificio FIM created a considerable increase in the local economy which was previously based on fishing and agriculture.