Arosio is a comune (municipality) in the Province of Como in the Italian region Lombardy, located about 30 km north of Milan and about 15 km southeast of Como. As of 31 December 2004, it had a population of 4,521 and an area of 2.7 km².

Arosio borders the following municipalities: Carugo, Giussano, Inverigo.

Arosio is a valuable town in Brianza a geographical area at the foot of the Alps, and is a part of the Parco della Valle del Lambro. It is crossed by two important roads named Nuova Vallassina and Novedratese

The town hosted the Institute for Invalids where Don Carlo Gnocchi founded the Federation for Mutilated Children, in 1952 began the Juvenile Foundation, today known as the Don Carlo Gnocchi – ONLUS Foundation.

The bird observatory Osservatorio Ornitologico di Arosio was established in 1710. It has a museum.

Edvard Hagerup Grieg /ˈɛdʋɑɖ ˈhɑːgəɾʉːp gɾiːg/ (15 June 1843 – 4 September 1907) was a Norwegian composer and pianist. He is best known for his Piano Concerto in A minor, for his incidental music to Henrik Ibsen's play Peer Gynt (which includes Morning Mood and In the Hall of the Mountain King), and for his collection of piano miniatures Lyric Pieces.

Edvard Hagerup Grieg was born in Bergen, Norway on 15 June 1843. His parents were Alexander Grieg (1806–1875), a merchant and vice consul in Bergen, and Gesine Judithe Hagerup (1814–1875), a music teacher and daughter of Edvard Hagerup. The family name, originally spelled Greig, has Scottish origins. After the Battle of Culloden in 1746, Grieg's great-grandfather traveled widely, settling in Norway about 1770, and establishing business interests in Bergen.

Edvard Grieg was raised in a musical area. His mother was his first piano teacher and taught him to play at the age of 6. Grieg studied in several schools,^{[clarification needed]} including Tank's School. He often brought in samples of his music to class.^{[citation needed]}