Charles X (Charles Philippe; 9 October 1757 – 6 November 1836) was King of France from 16 September 1824 until 2 August 1830. An uncle of the uncrowned Louis XVII and younger brother of reigning kings Louis XVI and Louis XVIII, he supported the latter in exile. After the Bourbon Restoration in 1814, Charles (as heir-presumptive) became the leader of the ultra-royalists, a radical monarchist faction within the French court that affirmed absolute monarchy by divine right and opposed the constitutional monarchy concessions towards liberals and the guarantees of civil liberties granted by the Charter of 1814. Charles gained influence within the French court after the assassination of his son Charles Ferdinand, Duke of Berry, in 1820 and succeeded his brother Louis XVIII in 1824.

At his coronation in 1825 he tried to revive the practice of the royal touch. The governments appointed under his reign reimbursed former landowners for the abolition of feudalism at the expense of bondholders, increased the power of the Catholic Church, and reimposed capital punishment for sacrilege, leading to conflict with the liberal-majority Chamber of Deputies.

Charles approved the French conquest of Algeria as a way to distract his citizens from domestic problems, and forced Haiti to pay a hefty indemnity in return for lifting a blockade and recognizing Haiti's independence. He eventually appointed a conservative government under the premiership of Prince Jules de Polignac, who was defeated in the 1830 French legislative election. He responded with the July Ordinances disbanding the Chamber of Deputies, limiting franchise, and reimposing press censorship.

Within a week, Paris faced urban riots which led to the July Revolution of 1830, which resulted in his abdication and the election of Louis Philippe I as King of the French. He was the last of the French rulers from the senior branch of the House of Bourbon. Exiled once again, Charles died in 1836 in Gorizia, then part of the Austrian Empire.

Charles Philippe of France was born in 1757, the youngest son of the Dauphin Louis and his wife, the Dauphine Marie Josèphe, at the Palace of Versailles. Charles was created Count of Artois at birth by his grandfather, the reigning King Louis XV.^{[citation needed]} As the youngest male in the family, Charles seemed unlikely ever to become king. His eldest brother, Louis, Duke of Burgundy, died unexpectedly in 1761, which moved Charles up one place in the line of succession. He was raised in early childhood by Madame de Marsan, the Governess of the Children of France.^{[citation needed]}

At the death of his father in 1765, Charles's oldest surviving brother, Louis Auguste, became the new Dauphin (the heir apparent to the French throne). Their mother Marie Josèphe, who never recovered from the loss of her husband, died in March 1767 from tuberculosis. This left Charles an orphan at the age of nine, along with his siblings Louis Auguste, Louis Stanislas, Count of Provence, Clotilde ("Madame Clotilde"), and Élisabeth ("Madame Élisabeth"). Louis XV fell ill on 27 April 1774 and died on 10 May of smallpox at the age of 64. His grandson Louis-Auguste succeeded him as King Louis XVI.

In November 1773, Charles married Marie Thérèse of Savoy. In 1775, Marie Thérèse gave birth to a boy, Louis Antoine, who was created Duke of Angoulême by Louis XVI. Louis-Antoine was the first of the next generation of Bourbons, as the king and the Count of Provence had not fathered any children yet, causing the Parisian libellistes (pamphleteers who published scandalous leaflets about important figures in court and politics) to lampoon Louis XVI's alleged impotence. Three years later, in 1778, Charles' second son, Charles Ferdinand, was born and given the title of Duke of Berry.

Also in 1778, Queen Marie Antoinette gave birth to her first child, Marie Thérèse, quelling all rumours that she could not bear children. Charles was thought of as the most attractive member of his family, bearing a strong resemblance to his grandfather Louis XV. His wife was considered quite ugly by most contemporaries, and he looked for company in numerous extramarital affairs. According to the Count of Hézecques, "few beauties were cruel to him". Among his lovers was notably Anne Victoire Dervieux. Later, he embarked upon a lifelong love affair with the beautiful Louise de Polastron, the sister-in-law of Marie Antoinette's closest companion, the Duchess of Polignac.