Sheikh Mohamed bin Zayed bin Sultan Al Nahyan (Arabic: محمد بن زايد آل نهيان, romanized: Muḥammad bin Zāyid Āl Nahyān; born 11 March 1961), also known as MbZ, is an Emirati royal and politician who is serving as the third and current president of the United Arab Emirates and ruler of Abu Dhabi since 2022.

Mohamed completed his education in Abu Dhabi and Al Ain and graduated from the Royal Military Academy Sandhurst in April 1979. He later joined the UAE Armed Forces and held various posts before becoming a pilot in the UAE Air Force; he was promoted to general in 2005.

Mohamed is the third son of Sheikh Zayed bin Sultan Al Nahyan, the first president of the UAE and the 16th ruler of Abu Dhabi. Mohamed became the crown prince of Abu Dhabi in November 2004, following the death of his father, when his brother, Sheikh Khalifa became the second president of the UAE and the ruler of Abu Dhabi. In 2014, Sheikh Khalifa suffered a stroke and Mohamed became the de facto president of the UAE and ruler of Abu Dhabi. Mohamed officially became president of the UAE and ruler of Abu Dhabi, after being chosen by the UAE Supreme Council, following the death of his brother on 13 May 2022. On 29 March 2023, Mohamed appointed his son Sheikh Khalid as crown prince of Abu Dhabi and his future successor.

Academics have characterized the UAE under Mohamed as an authoritarian capitalist country. Since Mohamed became the de facto president, he introduced policies which aimed at economic liberalization. This included the introduction of VAT in 2018, corporate taxes and bankruptcy laws; the elimination of gas subsidies, as well as the removal of curbs of foreign ownership of businesses and the decriminalization of bounced cheques. Mohamed also introduced liberal social policies under his watch, including the de jure removal of corporal punishment and Sharia law outside of blood money claims and personal status matters of Muslims; the decriminalization of co-habitation, extra-marital relationships and alcohol consumption by Muslims; a legal process of children born outside of wedlock; and civil courts for personal status matters of non-Muslims residents.

Mohamed is known to be a fierce opponent of the Muslim Brotherhood, Iran and its proxies in the Middle East. Since becoming de facto president, the UAE participated in the war against ISIS in Iraq and Syria, the Syrian civil war and was officially part of the Saudi-led coalition in Yemen until the Mohamed disagreed with the Saudi Arabia's approach in the war for its support of Al-Islah, a party which is known to have close connections with the Muslim Brotherhood but has maintained his support of the Southern Transitional Council. Mohamed fell out with the Obama administration on the Iran nuclear deal and supported the US withdrawal from the Iran nuclear deal. The UAE was a leading party in the Qatar diplomatic crisis, in which the UAE, Saudi Arabia, Bahrain and other Arab countries like Egypt and Jordan severed diplomatic relations with Qatar based on claims that Qatar supports the Muslim Brotherhood and its offshoot organizations. Mohamed maintained a close relationship with former US President Donald Trump, with reports suggesting that Mohamed was pushing Trump to take a tougher stance on Iran and the Muslim Brotherhood. In September 2020, the UAE, alongside Bahrain, and later Morocco and Sudan, signed the Abraham Accords, an agreement to normalize diplomatic relationship with the State of Israel, a deal which was brokered by Trump. The UAE has more recently been involved in an economic rivalry with Saudi Arabia, and opposed Saudi efforts for OPEC+ production cuts.

In 2019, The New York Times named him as the most powerful Arab ruler, and was named as one of the 100 Most Influential People of 2019 by Time magazine. In 2023, the Royal Islamic Strategic Studies Centre ranked Mohamed as the eighth-most influential Muslim.