Tiruvallur (திருவள்ளூர்) is a district in northeastern Tamil Nadu, adjoining Chennai and bordering Andhra Pradesh. Its headquarters is Tiruvallur town. The district brings together expanding urban neighbourhoods, industrial areas, farming villages and coastal settlements. It is known for major industrial centres, important temples and water bodies that help supply the Chennai region.
Tamil is the main language, and local life reflects agricultural traditions, temple festivals and the influence of nearby Chennai. Manufacturing, logistics, farming, fishing and services support livelihoods. Ambattur and Gummidipoondi are prominent industrial areas. Notable places include the Veeraraghava Perumal Temple in Tiruvallur, the Murugan temple at Tiruttani, Poondi reservoir and Pulicat Lake, shared with Andhra Pradesh.
Common civic concerns include reliable drinking water, flood management, sewage treatment, waste collection and industrial pollution. Residents also seek better roads, public transport, healthcare and schools. Protecting wetlands, coastal livelihoods and farmland while managing rapid urban growth is an important district-wide challenge.