Henri I de Saint-Nectaire, marquis de La Ferté-Nabert, (1573 – 4 January 1662 in Paris), was a French general and diplomat.
He was a son of the Marquis François de Saint-Nectaire, State Councilor and Knight of the Order of the Holy Spirit, and of Jeanne de Laval, mistress of King Henry III.
He joined the King's Army at a young age and by 1622, he was Maréchal de camp in the army of Louis, Count of Soissons at La Rochelle.
He was subsequently Minister of State and a Knight of the Order of the Holy Spirit.
He married first Marguerite de La Châtre, daughter of Claude de La Châtre de La Maisonfort, and had Then he married in second marriage Anne de Sully-Rosny, bastard daughter of Maximilian II of Béthune.