Khan Bahadur (Bengali: ?, Urdu: , Hindi: ) - a compound of khan (leader) and Bahadur (Brave) - was a formal title of respect and honour, which was conferred exclusively on Muslim and other non-Hindu subjects of the British Indian Empire. It was a title one degree higher than the title of Khan Sahib.
The title was conferred along with a medal and a citation (or sanad) and the recipient was entitled to prefix the title to his name. The title was conferred on behalf of the British Indian Government by the Viceroy and Governor-General of India.
The title "Khan Bahadur" was originally conferred by the Mughal Empire on Muslim subjects in recognition of public services rendered and was adopted by the British Indian Empire for the same purpose and extended to cover other non-Hindu subjects of the Indian Empire. Hindu subjects of the British Indian Empire were conferred the title of "Rai Bahadur".
The chronological list of recipients below is not exhaustive
31 December 1895: Sardar Mir Muhammad Hassan Gichki of Sami. (Makran Balochistan)
1852-1902: khan Bahadur Malik Lal Khan Kasir Hind medal. Indian General Services medal. chief of Awan Sheriaal tribe Pindigheb. He served 30 years to British Indian Railways and retired as Senior Station Master from British Indian Railways.
1899: Khan Bahadur Ghulam Haider Khan (Chief of Sherwani Tribe).
1901: Khan Bahadur Maulvi Inam Ali BA,SCS. DC & Divisional Session Judge SIALKOT,Multan, Montgomery, Muzaffargarh, Dera Ghazi khan, President of Coronation Celebrations Committee, Multan for Emperor Edward V11. Awarded coronation Medal on attending Coronation Celebrations King George V & Queen Mary in Delhi in 1911.
4 April 1903: Khan Bahadur Cayan Uddin Ahmet (Chief Secretary of Bengal Presidency).
1922: Sardar Nawab Khan Luni Sardar of Luni Tribe, For meritorious services in Balochistan. (Luni, Balochistan)
January 1925 Khan Sahib Sayad Nazir Husain, M.B.E., Civil Surgeon, Punjab.
1925: Khan Bahadur Maulvi Alimuzzaman Chaudhuri. M.L.C. Landholder and Chairman, District Board and Municipality, Faridpur. 
1925: Muhammad Salim 'Ali Adviser on Arab affairs in Aden.
2 January 1925: (Ali Ibrahim Lokman) from Aden Colony, awarded the title 'Bahadur Khan' Advisor on Arab Affairs Translation and Administration Services * HAJI ABDULLAH HAJI KASIM SAHEB BAHADUR
1925: Khan Bahadur Aga Syed Hussain, then Governor of Kashmir, later the First Muslim Minister to Maharaja Hari Singh in the Dogra Rule, awarded for his meritorious services.
1928: Alhaj Ghulam Muhammad Khan son of Khan Naurang Khan, an elder of Spin Gund faction of Lakki Marwat was awarded this title for streamlining the cordial relationship between the British and hostile Spin Gund tribe of Lakki Marwat. The Deputy Commissioner/Collector of District Bannu/Edwardabad at that time Major A.E.D. Parton had to send his medal and Sanad through a messenger as he declined to attend the public awarding ceremony at Deputy Commissioner's Office in Bannu.
1928: Khan Bahadur Shah Hayat Ahmad, Sajjadah Nasheen Dargah Rudauli Sharif, Khanqah Shaikh Ahmad Abdul Haq, on 4 February 1928.
1930: Khan Bahadur, Syed Niaz Qutb (also spelled as Qutab), Postmaster General, Indian Civil Service, Government of India under the British Crown, titled conferred as a recognition of his personal distinction in administrative services and professional contribution to the institution of post office in British administered India 
1930: Khan Bahadur Khurshid Ahmed (Rough year)
1931: Khan Bahadur, Khan Sahib Chaudhri Khair-Ud-Din(MBE, OBE). Borstal Institution, Lahore Punjab.For services to the Crown and construction of Montgomery(Sahiwal)canal in Punjab.(Member of the British Empire, Order of the British Empire).
1931: Khan Bahadur Maulvi Muhammad Fazlul Karim, retired Magte. and Collector, Bengal. The administrator of Refugees Bengal, Government of India. 
1933: Khan Bahadur Justice Syed Ziaul Hasan, Chief Justice at Chief Court of Awadh, Lucknow. He belongs to a Zamindar Family of Moradabad and was the district & session judge when the title of Khan Bahadur was conferred upon him as a personal distinction by then Viceroy Lord Willington.
1934: Khan Bahadur Saiyid Abdul Hasan, District Settlement Officer and later President of the Court of Wards in the United Provinces. He belonged to a taluqdari (madad-i ma'ash) family of Faizabad in the United Provinces.
1934: Khan Bahadur Syed Ahsan Quli, Inspector General of Imperial police Bihar and Orissa.
1936: Khan Bahadur Waliur Rahman, Planter and Proprietor of several tea gardens in Duars, Assam.
1936: Khan Bahadur Syed Muzaffar Yazdan.
1936: Khan Bahadur Muhammad Sher Khan, Marghuz Village, Mardan Tehsil.
1938: Khan Bahadur Maulvi Muhammad Yahya, (retd.) Dy. Magte. and Dy. Collector and Chief Manager, Dacca Nawab Estate
1940: Khan Bahadur Syed Muhammad Ameer Naqvi (Patna -bihar-Hazaribagh- Jharkhand).-
1943: Rao Qurban Ali khan, Hen Bane Nursery, (established, 1912) saharanpur
1943: Khan Bahadur Yousof Hossain Chaudhury, Vice-President, District School Board, Faridpur. 
1944: Khan Bahadur Munshi Abdul Karim Khan, Deputy Superintendent of Police, Bareilly.
1945: Maulvi Mahammad Roufique, Chairman, Nowgaon local board.
1948: Lt Colonel Khan Bahadur Muhammad Hassan Khan(Late), 1st Muslim Army Officer who was appointed by Quaid-e-Azam Muhammad Ali Jinnah as 1st Director General Survey of Pakistan belongs to village Domeli (now Rasul Pur Jali) near Jhelum. He served in the British Royal Army as well as in Pakistan Army in the Magnificent 4th Bn of Engineer Regiment, One of the most courageous and generous officers who fought in World War I & II. Because of him Pakistan occupied 3871 Square Km more during partition through the Red Cliff award. He died on 21 December 1948. Father of Lieutenant Colonel Qurban Hassan Khan(Late) 18 PMA Long Course, Chief Instructor ISI, later Advisor to the Prime Minister UAE. His Grand son Lt Colonel Faisal Hassan Khan is third generation officer serving in the Army.
1940: Khan Bahadur, Khan Sahib Yar Muhammed Khan Barrech, son of Wali Muhammed Barrech was an afghan orphan who migrated from shorawak (a small village of Afghanistan) during the second Afghan war. he knew nothing but Pashto when he came to Quetta but within the years that passed he traveled the whole world, gained enormous wealth (possibly the might have been the richest merchant in Quetta of his time) and also did he become a polyglot (a person who can speak 5 languages including English). The Viceroy of India sir Archibald Wavell who considered him his friend even after his term wrote him letters and even gave him the Title of khan sahib, later after the 1935 earthquake that struck Quetta did he earn the title of khan Bahadur due to his enormous help. A street in Quetta is named after him. He died on 14 August 1968.
1946: Mahr Muhammad Yar Lak, Landlord, Jura Sakesar, Tahsil Sargodha, Shahpur District, Punjab
Alhaj Khan Bahadur Syed Mohammad Abbas Zaidi, IAS from Jalali, Aligarh was awarded for his meritorious services during pre-partition days.
Khan Bahadur Syed Mohammad Zaki Rizvi of Sitapur who was Inspector of schools was awarded for his meritorious services.
Sardar Syed Mehr Shah Gharshin was also awarded with the title
^V?rshika Ripor?a. Department of India Posts and Telegraphs, British Government of India. 1929.
^Government of Bengal. The Bengal Civil List (Published annually). Corrected up to 1st July 1944. No. 279. Part II - List of Persons in Bengal Holding Titles Conferred or Recognized by His Excellency The Viceroy. Page 443
^The Bengal Civil List (Published half yearly) corrected up to 1st January 1937; Appendix - List of Title-Holders and Recipients of Decorations, etc. Page 696
^Government of Bengal. The Bengal Civil List (Published annually). Corrected up to 1st July 1944. No. 279. Part II - List of Persons in Bengal Holding Titles Conferred or Recognized by His Excellency The Viceroy. Page 444
^Government of Bengal. The Bengal Civil List (Published annually). Corrected up to 1st July 1944. No. 279. Part II - List of Persons in Bengal Holding Titles Conferred or Recognized by His Excellency The Viceroy. Page 445