Khambhat state or Cambay state was a princely state in India during the British Raj. The city of Khambhat in present-day Gujarat was its capital. The state was bounded in the north by the Kaira district (Kheda) and in the south by the Gulf of Khambhat.

Cambay was the only state in the Kaira Agency of the Gujarat division of the Bombay Presidency, which merged into the Baroda and Gujarat States Agency in 1937.

Maharaja of Parmar Rajputs had established the State of Cambay. Cambay was invaded in 1730 by the penultimate Mughal governor of Gujarat, Mirza Ja‘far Mu’min Khan I, the last of the Mughal governors of Gujarat, at the time of the dismemberment of Mughal rule in India. In 1742 Mirza Ja‘far Mu’min Khan I defeated his brother-in-law Nizam Khan, governor of Khambhat, and established himself in his place.

The traders and the merchants reached here from across the world. Cambay was known for its cotton and silk cloths. Cambay was one of India's most active trade center since the 14th century (Source: Ibn Battuta). After 200 years, Duarte Barbosa described Cambay as an important commercial center with carpets, and other textile goods in Mughal established industries.

The rulers of the state bore the title of 'Nawab' and had the privilege of an 11-gun salute.

• 1730 – 1742 Mirza Jaffar Mumin Khan I, penultimate Mughal governor of Gujarat
• 1742 – 1743 Nur-ud-din Muftakher Khan
• 1743 – 1784 Najm ad-Dawla Ja`far Mu´min Khan II
• 1784 – 1790 Mohammad Qoli Khan (d. 1790)
• 1790 – 28 October 1823 Fath `Ali Khan (d. 1823)
• 1823 – 15 March 1841 Banda `Ali Khan (d. 1841)
• 1841 – Apr 1880 Husayn Yawar Khan I (d. 1880)
• 11 Jun 1880 – 21 January 1915 Najib ad-Dawla Mumtaz al-Molk Ja`far `Ali Khan (b. 1848 – d. 1915)
• 21 Jan 1915 – 1930 .... -Regent
• 21 Jan 1915 – 15 Aug 1947/10 June 1948 Nizam ad-Dawla Najm ad-Dawla Mumtaz al-Molk Husayn Yawar Khan II (b. 1911 – d. ....)

• Mirza JA'AFAR MU'MIN KHAN I 1730/1742, last Muslim Governor of Gujarat
• Nawab NURADDIN MUFTAKHAR KHAN 1742/1743
• Nawab JA'AFAR MU'MIN KHAN II 1743/1784
• Nawab MUHAMMED QULI KHAN 1784/1790, son of Najam Khan (poisoned 1748), married and had issue. He died 1790.
• Nawab FATH ALI KHAN (qv)
• Nawab FATH ALI KHAN 1790/1823, eldest of three sons, he received the title Najum-ud-Daulah Mumtaz-ul-Mulk Khan Bahadur Dilawar Jung, and the rank of a commander of six thousand as Nawab of Cambay.
• Najum-ud-Daulah Mumtaz-ul-Mulk Momin Khan Bahadur Dilawar Jung Nawab BANDA ALI KHAN 1823/1841
• Najum-ud-Daulah Mumtaz-ul-Mulk Momin Khan Bahadur Dilawar Jung Nawab HUSAIN YAWAR KHAN I 1841/1880
• Najum-ud-Daulah Mumtaz-ul-Mulk Momin Khan Bahadur Dilawar Jung Nawab JA'AFAR ALI KHAN Bahadur 1880/1915, born 1848, succeeded 11 June 1880 (#1), married 1stly, 1876, Bibi Gauhar Khanum Saheb, married 2ndly, 1882, Bibi Khurshid Jahan Begum. He died 21 January 1915.
• HH Najum-ud-Daulah Mumtaz-ul-Mulk Momin Khan Bahadur Dilawar Jung Nawab Mirza HUSAIN YAWAR KHAN II Bahadur 1915/- , born 16 May 1911, educated at Rajkumar College, Rajkot; married January 1936, Nawabzadi Safia Sultan Qizilbash, daughter of Nawab Sir Fateh Ali Khan Qizilbash of Lahore (see Nawabganj), and had issue.
• HH Najum-ud-Daulah Mumtaz-ul-Mulk Momin Khan Bahadur Dilawar Jung Nawab Mirza MUHAMMED JA'AFAR ALI KHAN

The rulers were titled 'Maharaja'. They had the right to an 11 gun salute.

Cambay State Council with S Parmar have been entrusted with the erstwhile princely state of Cambay.

• Political integration of India
• Princely State
• Baroda and Gujarat States Agency

• https://web.archive.org/web/20091009120131/http://www.uq.net.au/~zzhsoszy/ips/c/cambay.html

• Media related to Cambay State at Wikimedia Commons

22°18′N 72°37′E / 22.3°N 72.62°E / 22.3; 72.62