Philip August Frederick (11 March 1779 – 15 December 1846) was Landgrave of Hesse-Homburg from 19 January 1839 until his death.

In 1829, Great Britain proposed to make Philip King of newly independent Greece.

He was injured during the Battle of Wagram and subsequently received the Military Order of Maria Theresa.

He was transferred to Vienna and his brigade was part of an army corps led by Karl Philipp, Prince of Schwarzenberg.

In 1839, his elder brother Louis William died in Philip inherited Hesse-Homburg.

In 1840, Philip was appointed as governor of Mainz; he left the government of his principality to his younger brother Gustav.

In 1838, Philip married morganatically with Rosalie Antonie, Baroness Schimmelpfennig von der Oye, née Pototschnig.