Ashmun al-Rumman (Arabic: اشمون الرمان Ashmūn ar-Rummān, Coptic: ϣⲙⲟⲩⲛ ⲉⲣⲙⲁⲛ Shmoun Erman) is a village in the markaz of Dekernes in Dakahlia Governorate, Egypt.

Known in classical antiquity as Zmoumis (Ancient Greek: Ζμουμις) and in the Islamic Middle Ages as Ushmum-Tannah, Ashmun al-Rumman was formerly a major city, serving as a provincial capital.

At the time of the Rauk el-Naçiri, it was part of a region called the ˁamal Ushmūm-Ṭannāḥ, stretching from the areas of Alexandria to Damietta, and comprising the districts of Rosetta and Borollos alongside the provinces of Dakahlia and al-Murtahiya.

[3] The 1885 Census of Egypt recorded Ashmun al-Rumman (as Achmoun-el-Romman) as a nahiyah in the district of Dekernes in Dakahlia Governorate; at that time, the population of the town was 1,881 (942 men and 939 women).

There were 3 Muslim kuttabs as well as a Coptic school, two mosques, a steam-powered flour mill, a small post office, looms making wool and cotton cloth, and dye workshops.