25°18′1″N 60°36′46″E / 25.30028°N 60.61278°E / 25.30028; 60.61278 Chabahar Port (Persian: بندر چابهار) is a seaport located in Chabahar in southeastern Iran, on the Gulf of Oman. It serves as Iran's only oceanic port, and consists of two separate ports named Shahid Kalantari and Shahid Beheshti, each of which has five berths. It is only about 170 kilometres west of the Pakistani port of Gwadar.

Development of the port was first proposed in 1973 by the last Shah of Iran, though development was delayed by the 1979 Iranian Revolution. The first phase of the port was opened in 1983 during the Iran–Iraq War as Iran began shifting seaborne trade east towards the Pakistani border in order to decrease dependency on ports in the Persian Gulf, which were vulnerable to attack by the Iraqi Air Force.

India and Iran first agreed to plans to further develop Shahid Beheshti port in 2003, but did not do so on account of sanctions against Iran. As of 2016, the port has ten berths. In May 2016, India and Iran signed a bilateral agreement in which India would refurbish one of the berths at Shahid Beheshti port, and reconstruct a 600 meter long container handling facility at the port. The port is partly intended to provide an alternative for trade between India and Afghanistan as it is 800 kilometers closer to the border of Afghanistan than Pakistan's Karachi port. The port handled 2.1 million tons of cargo in 2015, which was planned to be upgraded to handle 8.5 million tons by 2016, and to 86 million tons in the future.

In October 2017, India's first shipment of wheat to Afghanistan was sent through the Chabahar Port. In December 2018, India took over the port's operations. Following the re-imposition of sanctions against Iran, foreign companies became reluctant to participate in the port's expansion, and only 10% of the port's 8.5 million-ton total capacity was utilized in 2019. Sanctions also played a role in reducing India's involvement and investment in the US$1.6 billion Chabahar–Zahedan railway.

The port of Chabahar is located on the Makran coast of Sistan and Baluchistan Province, next to the Gulf of Oman and at the mouth of the Strait of Hormuz. It is the only Iranian port with direct access to the Indian Ocean. Being close to Afghanistan and the Central Asian countries of Turkmenistan, Uzbekistan and others, it has been termed the "Golden Gate" to these landlocked countries.

Chabahar is 700 km (430 mi) away from Zahedan, the capital of the Sistan and Baluchistan province, 950 km (590 mi) away from Milak, the closest city to the Afghan border, and 1,827 km (1,135 mi) away from Sarakhs on the Turkmen border.

The marine distance to Dubai is 353 nautical miles (654 kilometres; 406 miles), to Karachi in Pakistan is 456 nmi (845 km; 525 mi), and to Mumbai in India is 843 nmi (1,560 km; 970 mi) . Pakistan's deep sea port at Gwadar is also on the Makran coast, at a distance of a mere 76 nautical miles. Gwadar also claims to provide access to Central Asia, and comparisons between the two ports are frequently made by analysts.

Because 90 percent of Iran's population is concentrated in the western part of the country, the eastern part is relatively less developed. Iran is intending to change that with the development around Chabahar port, with a free trade zone and road and rail links between Chabahar and Central Asia. Its plan is to use Chabahar port as the gateway to Central Asia and to maintain the Bandar Abbas port, which currently handles 85% of Iran's seaborne trade, as a hub for trade with Russia and Europe.