Countess Ludwika "Luds" Maria Poniatowska (30 November 1728 – 2 October 1804) was a Polish noblewoman, known as the sister of the King of Poland, Stanisław August Poniatowski.

She and her sister Izabella Poniatowska both opposed her brother's suggested marriage to princess Sophia Albertina of Sweden.

[1] In the spring of 1791, she and her daughter visited Paris during a difficult period in Poland, which attracted bad publicity.

On 7 January 1795, she, her daughter and family joined king Stanisław in Grodno, and remained by his side during the Third Partition of Poland.

[2] On 9 September 1801, she and her daughter donated the Kazanowski Palace as a residence for the future Louis XVIII of France.