Kalba is a town in the United Arab Emirates. It is an exclave of the emirate of Sharjah lying on the Gulf of Oman coast north of Oman and south of the emirate of Fujairah. Khor Kalba (Kalba Creek), an important nature reserve and mangrove swamp, is located south of the town by the Omani border. The town was captured by the Portuguese Empire in the 16th century and was referred to as Ghallah. It was attacked, sacked and put to the torch by the Sultan of Muscat's forces in March 1811 as part of the ongoing British/Omani campaigns against the maritime forces of the Al Qassimi. It was a Trucial State from 1936 to 1951 before being reincorporated into Sharjah.
Khor Kalba is currently closed to the public and is being developed as an eco-tourism resort by the Sharjah Investment and Development Authority (Shurooq). A number of conservationists and ecologists have expressed concern regarding the project.