| Order: | 15th |
| Office: | Governor of Madhya Pradesh |
| Term Start: | 30 June 2009 |
| Term End: | 7 September 2011 |
| 1Blankname: | Chief Minister |
| 1Namedata: | Shivraj Singh Chauhan |
| Predecessor: | Balram Jakhar |
| Successor: | Ram Naresh Yadav |
| Order1: | 10th |
| Office1: | Governor of Karnataka |
| Term Start1: | 21 August 2007 |
| Term End1: | 24 June 2009 |
| 1Blankname1: | Chief Minister |
| 1Namedata1: | H. D. Kumaraswamy B. S. Yediyurappa |
| Predecessor1: | T. N. Chaturvedi |
| Successor1: | Hansraj Bhardwaj |
| Office2: | Governor of Andhra Pradesh |
| Status2: | (Additional Charge) |
| Term Start2: | 29 January 2006 |
| Term End2: | 22 August 2007 |
| 1Blankname2: | Chief Minister |
| 1Namedata2: | Y. S. Rajasekhara Reddy |
| Predecessor2: | Sushil Kumar Shinde |
| Successor2: | Narayan Dutt Tiwari |
| Order3: | 22nd |
| Office3: | Governor of Odisha |
| 1Blankname3: | Chief Minister |
| 1Namedata3: | Naveen Patnaik |
| Term Start3: | 18 November 2004 |
| Term End3: | 21 August 2007 |
| Predecessor3: | M. M. Rajendran |
| Successor3: | Murlidhar Chandrakant Bhandare |
| Office4: | Union Minister of India |
| Office5: | President of the Bharat Scouts and Guides |
| Term Start5: | 1998 |
| Term End5: | 2001 |
| Office6: | President of the ICAI |
| Term Start6: | 1966 |
| Term End6: | 1967 |
| Predecessor6: | CA. M.P. Chitale |
| Successor6: | CA. V.B. Haribhakti |
| Birth Date: | 28 July 1925 |
| Birth Place: | Thakurgangti, Bihar-Orissa, British India (now in Jharkhand, India) |
| Death Place: | Delhi, India |
| Nationality: | Indian |
| Party: | Indian National Congress |
| Spouse: | Narmada Thakur |
| Children: | 4 |
Rameshwar Thakur (28 July 1925 – 15 January 2015) was a politician and former union minister of India, he also served as the Governor of Madhya Pradesh from 2009 to 2011, Governor of Odisha from 2004 to 2006, Governor of Andhra Pradesh from 2006 to 2007 and Governor of Karnataka from 2007 to 2009. He was a Chartered Accountant. He was also President of the Institute of Chartered Accountants of India from 1966 to 1967.
Thakur was born in the village of Thakur Gangti, Godda District, Jharkhand. He had participated in Quit India movement. He served as President of the Bharat Scouts and Guides from November 1998 to November 2001, and again after November 2004. Thakur was sworn in as the 15th Governor of Karnataka on August 21, 2007.[1]
He was married to Narmada Thakur and they had two sons and two daughters: Mridula, Sangeeta, Sushil and Anil Thakur.
He was transferred to Governor Madhya Pradesh for the remainder of his gubernatorial term on June 24, 2009. Thakur took over from Balram Jakhar on the end of the latter's term on June 30. He left office on September 7, 2011.[2]
He was the governor of Odisha during the year 2004 to 2007. He was promoter of Information Technology (IT). He was supportive of one of the earliest conferences on IT called OITS International Conference on Information Technology (OCIT), which was formerly known as ICIT or CIT.[3] OCIT 2023 was held at NIT Raipur during December 2023.
Rameswar died on 15 January 2015 at Delhi.[4]