Johann Krieger (28 December 1651 – 18 July 1735) was a German composer and organist, younger brother of Johann Philipp Krieger. Born in Nuremberg, he worked at Bayreuth, Zeitz, and Greiz before settling in Zittau. He was one of the most important keyboard composers of his day, highly esteemed by, among others, George Frideric Handel. A prolific composer of church and secular music, he published several dozen of his works, and others survive in manuscript. However, hundreds more were lost when Zittau was destroyed by fire in 1757, during the Seven Years' War.
Krieger's keyboard music places him among the most important German composers of his time. The two published collections, Sechs musicalische Partien (1697) and Anmuthige Clavier-Übung (1698), contain harpsichord suites, organ toccatas, fugues, ricercars, and other works. Krieger's contemporaries praised his contrapuntal skill, evident in the extant fugues and ricercars. Johann Mattheson was particularly impressed with Krieger's double fugues, remarking that he knew nobody who surpassed Krieger in this form, except Handel. Handel himself admired and studied Krieger's work, even taking a copy of Anmuthige Clavier-Übung with him to England.
Johann and his older brother Johann Philipp came from a Nuremberg family of rugmakers. Neither are related to Adam Krieger, another Baroque composer. Johann studied with Heinrich Schwemmer (teacher of Johann Pachelbel) at St. Sebaldus, and sang in the choir there for several years. From 1661–68 Krieger studied keyboard playing with Georg Caspar Wecker. His older brother's development was different, for Johann Philipp studied with a Froberger pupil, Johann Drechsel. However, for about a decade from 1668 the two brothers' lives shared the same course. In 1671 both Kriegers studied composition at Zeitz. In 1672 Johann Philipp moved to Bayreuth and became court organist there. He very quickly rose to the rank of Kapellmeister, and was succeeded as court organist by Johann. In 1677 Johann Philipp was employed as court organist at Halle, and Johann soon became chamber musician at Zeitz, a city some 30 miles away. He then attained the position of Kapellmeister at Greiz (a further 30 miles south from Zeitz).