阿伦扎诺（意大利语：Arenzano）是意大利利古里亚大区热那亚省的一个镇。

Arenzano is a coastal town and comune in the province of Genoa, Liguria, Italy. As of 2007, it has a population of 11,568. This varies a lot during the holiday seasons, since it is a reasonably popular holiday resort for Italians.

There are a number of festivals during the summer, as with many towns in Italy. It is very close to Genoa (the capital town of the province). The town is safe for children to grow up, but buying a house there can be quite expensive. During the summer time Arenzano becomes crowded. Arenzano has an elementary school, a middle school and a couple of kindergartens. It also has a golf course and a few tennis courts.