Yeduguri Sandinti Vijayalakshmi (born 19 April 1956), better known as Y. S. Vijayamma, is an Indian politician from the Rayalaseema region of Andhra pradesh.

She was elected to the Andhra Pradesh Legislative Assembly as an unopposed Indian National Congress candidate in the by-election held to Pulivendula constituency in December 2009 to fill the vacancy caused by her husband's death.

[6] Vijayalakshmi and her son Y. S. Jagan Mohan Reddy were again elected to the assembly and Lok Sabha respectively in the by-elections held on 8 May 2011.

[8] Later, by undertaking the poll campaign along with her daughter Y. S. Sharmila Reddy, YS Vijaya guided the YSR Congress Party to an unprecedented victory in the June 2012 by-polls in which their party won 15 of the 18 assembly seats[9] for which the polls were held in the absence of her son Y. S. Jagan Mohan Reddy.

Vijayalakshmi went on repeated hunger strikes, protesting various policies such as a power tariff hike[10] and the Government's reluctance to release funds towards fee reimbursement of college students.