Career
Born in Fürstenau, he was the eldest child of George Albert III, Count of Erbach-Fürstenau and Josepha Eberhardine, a daughter of Christian, Prince of Schwarzburg-Sondershausen-Neustadt. In 1778 he succeeded his father as Count of Erbach–Fürstenau and Lord of Breuberg. Following the institution of primogeniture, he was able to became sole ruler.
In Dürkheim on 6 August 1782 Frederick Augustus married with Charlotte Louise Polyxene (*27 November 1755 – 20 May 1844), a daughter of Frederick Charles Kolb, Count of Wartenberg-Roth and Caroline Polyxena of Leiningen-Dagsburg-Hardenburg.
They had no children. Frederick Augustus died in Fürstenau aged 29 and was buried in Michelstadt.
