Elected as a Member of Lok Sabha (the lower house of the Parliament) first time in the 9th General election held in November 1989 from Western Uttar Pradesh parliamentary constituency of Bijnaur (SC). Thus, ensuring maiden entry of the BSP in the Lok Sabha after its formation in 1984. The first tenure in the Lok Sabha lasted from 02.12.1989 to 13.03.1991.

Entered Rajya Sabha, the Upper House of Indian Parliament first time from Uttar Pradesh in April 1994, again giving BSP its maiden entry into the Upper House. The tenure in the Rajya Sabha lasted from 03.04.1994 till 25.10.1996.

Created history of sort in the Indian politics on 3rd June, 1995 by becoming first Dalit lady to be sworn in as the Chief Minister of an Indian State. The history-making first Bahujan Government however lasted from 03.06.1995 to 18.10.1995.

Entered Uttar Pradesh Legislative Assembly first time in 1996, by getting elected from two assembly seats- Harora (SC) in Saharanpur district of Western Uttar Pradesh and Bilsi (SC) in the Budaun district in Ruhelkhand. Had to quit one seat of Bilsi on 22.10.1996. Resignation of mine from the Rajya Sabha was also accepted on 25.10.1996.

Elected for the Lok Sabha for second time in February 1998 parliamentary poll. This time however won from Akbarpur (SC) seat in the newly-created district of Ambedkar Nagar adjacent to Faizabad-Ayodhya. Had to resign from the Harora (SC) assembly seat on 10.03.1998 following election to the Lok Sabha. My term in the second Lok Sabha remained from 10.03.1998 to 26.04.1999.

Re-elected from the same Akbarpur (SC) Lok Sabha Seat in the 13th mid-term Lok Sabha election in 1999, a third entry in the Lok Sabha. Remain a member of the Lok Sabha till 10.10.1999 from 10.10.1999. Resigned from the membership of the Lok Sabha on 07.03.2002.

Contested and won February 2002 assembly elections from Harora (SC), district Saharanpur and Jahangirganj (SC) in Ambedkar Nagar district. Again decided to represent Harora, hence resigned from Jahangirganj seat on March 04, 2002.

In order to make preparation of third Bahujan Government in Uttar Pradesh, resigned from the membership of the Lok Sabha on March 07, 2002.

Took oath as Chief Minister of Uttar Pradesh third time on May 3, 2002. Remain on the post for about 15 months till 28 th August, 2003, following my decision to break alliance with the BJP & quit.

And, as per the LIMCA BOOK OF RECORD 2006 , former Uttar Pradesh Chief Minister Miss Mayawati Ji is the only woman chief minister of a State to be sworn in thrice in three contiguous Assemblies.

And, following acceptance of my resignation from the Chief Ministership on August 28th, 2003, also quit membership of UP Legislative Assembly Harora (SC) seat on the same day i.e. 28th August, 2003.

Then, contested April-May 2004 General Election and again won with a handsome margin from the Akbarpur (SC) seat to become MP, Lok Sabha for the fourth time. My fourth term in the Lok Sabha however could last till 26.06.2004 from 17.05.2004 following my decision to sit in the Upper House, instead of Lower House owing to pressure of party works .

Became Member of Parliament, Rajya Sabha for a six year tenure in the biennial election from Uttar Pradesh. Hence resigned from the Lok Sabha on 26.06.2004. My current tenure as a member of the Rajya Sabha is till 04.07.2010, beginning from the date of 05.07.2004.

Took oath as Chief Minister of Uttar Pradesh for the fourth time on 13.05.2007, after the BSP registered a comfortable majority win in the Uttar Pradesh Legislative Assembly general election, thrashing both the Samajwadi Party and the BJP.

Was administered oath of office as (MLC) Member of Uttar Pradesh Legislative Council on 3 July, 2007, after elected unopposed to Upper Chamber of state legislature. Responding to the choice to enter the house through the legislative council rather than the assembly election route, I have told media that "I have won several Assembly and Lok Sabha elections and could have easily been elected to the assembly this time also. But I chose to become MLC as I wish to concentrate on the development of all 403 assembly constituencies of the state rather than my constituency only... I am not Mulayam Singh Yadav, who had diverted all funds to develop his home area only...."