Louis IV, Count Palatine of the Rhine (1 January 1424, Heidelberg – 13 August 1449, Worms) was an Elector Palatine of the Rhine from the House of Wittelsbach in 1436 - 1449.

[citation needed] From the death of Louis III in 1436 until 1442, Louis IV ruled under the guardianship of his uncle, Count Palatine Otto I of Mosbach.

[2] Louis IV died aged 25 years in 1449 in Worms, and was buried in the Church of the Holy Spirit of Heidelberg.

His only son being a minor, Philipp, he fell under the guardianship of Louis' brother Frederick, who later adopted him and then seized the electoral title himself in 1451/52.

In 1445 he married Margarete of Savoy, widow of king Louis III of Naples and daughter of Duke Amadeus VIII of Savoy.