Nea Ionia (Greek: Νέα Ιωνία, meaning New Ionia) is a northern suburb of Athens, Greece, and a municipality of the Attica region. It has a surface train station (ISAP). The suburb was named after Ionia, the region in Anatolia from which many Greeks migrated in the 1920s following the Population exchange between Greece and Turkey. It is located northeast of the neighborhood of Patissia. It is located S of Attiki Odos which opened in 2001 and wasn't fully connected until February 2004, WSW of Kifissia and W of Kifissias Avenue, W of Marathonos Avenue, ENE of Athens and E of Kifissou Avenue. Its main street is one connecting Patissia and Kifissia.
The area was made up of farmlands and trees dominated the area. The trees are in the squares today. Urban development replaced much of the farmlands. Today, much of the municipality is urbanized while the businesses are along its main roads. Many of the trees are aligned with the streets and in squares. A few tracts of hilly grasslands lie to the east.
Nea Ionia has schools, lyceums, gymnasia, banks, a post office and squares (plateies).