Johann August Karl Fürst zu Wied, Graf zu Isenburg, Herr zu Runkel and Neuerburg was born 26 May 1779 in Neuwied, Neuwied District, Rhineland-Palatinate, Germany to Friedrich Karl zu Wied-Neuwied (1741–1809) and Maria Luise von Sayn-Wittgenstein-Berleburg (1747–1823). and died 21 April 1856 Neuwied, Neuwied District, Rhineland-Palatinate, Germany of unspecified causes. He married Henriette von Dorbenck (1781–1846) . He married 11 July 1812 in Braunfels, Lahn-Dill District, Hesse, Germany.
Johann August Karl zu Wied , also Johann August Carl zu Wied (born May 26, 1779 in Neuwied ; † April 21, 1836 ibid) was a Prussian lieutenant general and from 1802 to 1824 the third Prince of Wied-Neuwied and from 1824 to his Death of the first prince of the united principality of Wied . His full name after 1824 was Johann August Karl Fürst zu Wied, Graf zu Isenburg, Herr zu Runkel and Neuerburg .
Johann August Karl was the son of Prince Friedrich Karl zu Wied-Neuwied (1741–1809) and his wife Maria Luise Wilhelmine von Sayn-Wittgenstein-Berleburg (1747–1823)
Wied had been in the Dutch service since 1794 . On March 7, 1797, he joined the Prussian Army , was aggregated into the Guard Regiment and in mid-February 1798 was assigned as second staff captain . He was promoted to captain and company commander on September 9, 1800 . On September 20, 1802, he followed the call of the estates to take over the government from his father.  His father was mentally unstable and years ago they had tried in vain to have him incapacitated. At first he remained under guardianshiphis mother. On July 13, 1804, Wied actually took over the government. In the army he became a major on March 5, 1805. Since the prince had to look after his country, he retired from active military service. With the Rheinbundakt signed on July 12th 1806, the principality was mediatized and came to the Duchy of Nassau . On July 15, 1806 he was knight of the House Order of the Golden Lion and the Order of the Red Eagle .
When the Allies reached the Rhine during the Wars of Liberation, he was given the rank of Major General by the King of Prussia on July 9, 1814 . After the Congress of Vienna in 1815, the principality fell to Prussia. He became the prince on March 30, 1817 chief of the 1st Koblenz Landwehr Regiment and in the same capacity he received the 29th Landwehr Regiment on March 22, 1820.
In 1824 he inherited his fourth nephew, the imperial field marshal lieutenant Friedrich Ludwig, Prince of Wied-Runkel, and ruled the principality of Wied before it was finally dissolved in 1848.
The king of Prussia awarded him the Black Eagle Order on January 18, 1831 . On March 30, 1833, he also received the rank of Lieutenant General.
On June 11, 1812, he married in Braunfels Princess Sofie Auguste to Solms-Braunfels (1796-1855), daughter of Prince William of Solms-Braunfels . The couple had the following children:
- Wilhelmine Auguste (1813–1870) ⚭ September 11, 1832 in Neuwied Count Otto zu Solms-Laubach (1799–1872)
- Hermann Prince zu Wied (1814–1864) ⚭ in Biebrich June 20, 1842 Princess Marie of Nassau-Weilburg (1825–1902), daughter of Wilhelm I.
- Luise Wilhelmine Thekla (1817–1867)
- Otto Friedrich Albrecht (1818–1835)
He was also in a relationship with Henriette von Dorbenck (1781–1846). The couple had a son:
- Friedrich August von Pelken (1809–1885) married Leopoldine Kalthoff (1827–1907)
Kurt von Priesdorff : Soldier leadership . Volume 4, Hanseatische Verlagsanstalt Hamburg, undated [Hamburg], undated , DNB 367632799 , pp. 106-107, no. 1251.
|Offspring of Johann August zu Wied and Henriette von Dorbenck (1781–1846)|
|Friedrich August von Pelken (1809–1885)|
|Offspring of Johann August zu Wied and unknown parent|
|Luitgarde zu Wied (1813-1872)|
|Hermann zu Wied (1814-1864)||22 May 1814 Neuwied, Neuwied District, Rhineland-Palatinate, Germany||5 March 1864 Neuwied, Neuwied District, Rhineland-Palatinate, Germany||Marie von Nassau (1825-1902)|
|Luise Wilhelmine zu Wied (1817-1867)|
|Otto zu Wied (1818-1835)|