Ayer Rajah is a residential neighbourhood within the city of George Town in Penang, Malaysia. Located within the Pulau Tikus suburb, the neighbourhood lies 3.3 km (2.1 mi) west of the city centre. This leafy, affluent neighbourhood, situated adjacent to the Penang Botanic Gardens, mostly consists of landed properties such as bungalows and semi-detached houses, surrounded by tree-lined avenues.