Johanna Walpurgis of Leiningen-Westerburg (3 June 1647 - 4 November 1687), was a German noblewoman member of the House of Runkel (through female line surnamed Leiningen-Westerburg) and by marriage Duchess of Saxe-Weissenfels.
Born in Schaumburg an der Lahn, she was the third of nineteen children born from the marriage of George William, Count of Leiningen-Westerburg in Schaumburg and Countess Sophia Elisabeth of Lippe-Detmold.
From her eighteen older and younger siblings, eleven survive adulthood: Simon Philipp, Frederick William, Maria Christiana (by marriage Countess Reuss of Lobenstein), Sophia Magdalena (by marriage Countess of Schönburg-Hartenstein), John Anton, Christoph Christian, Johanna Elisabeth (by her two marriages Countess of Wied-Runkel and Metternich-Winneburg), Angelika Catherine (by marriage Grevinde af Vasaborg), Henry Christian Frederick Ernest, Georg II Charles Louis and Juliana Eleonore (by marriage Countess of Metternich-Winneburg).