Lafayette Lumpkin Foster (November 27, 1851 – December 2, 1901) was an American journalist and politician. A bureaucrat that held various positions in the state government of Texas, Foster was a member of the boards of both Baylor University and the Agricultural and Mechanical College of Texas, later becoming president of the A&M College of Texas, now known as Texas A&M University, from 1898 to his death three years later.

A strong believer in organization and progress, he played instrumental roles in the merger of two large Texas Baptist conventions, and Baylor University's move to Waco. He helped organize the first "Farmers' Camp Meeting" in 1898, which would turn into the Texas Farmers Congress and be held annually at the A&M College until 1915. Foster was the youngest speaker of the Texas House of Representatives at the time of his election to the office at the age of 33. He preferred to be known as L. L. Foster and few people actually knew his full name.

Lafayette Lumpkin Foster was born on November 27, 1851, in Sheltonville, Georgia, to Joseph Douglas Foster (February 22, 1829 - July 17, 1877), a veteran of both the Mexican–American War and the American Civil War, and Millie Malinda Foster (née Estes; September 15, 1833 – May 20, 1861) from Gwinnett County, Georgia. He was the first-born of five children. Sheltonville was located near the town of Cumming, in Forsyth County. During the Civil War, and after his mother's death, Foster and his siblings lived with his grandmother, Mary Foster. His father Joseph sided with the Confederacy, eventually becoming Captain in the 22nd Georgia Infantry Regiment of the confederate army, and was captured during the Battle of Gettysburg. After the battle he was held at the POW camp at Johnson's Island until near the end of the war. Lafayette Foster moved to Limestone County, Texas, penniless and at the age of 18. He initially lived in the community of Horn Hill and later moved to Springfield. He labored as a brick mason and cotton picker before saving enough money to afford to attend Waco University. At Waco, Foster specialized his studies in Mathematics and Latin, but did not graduate. He began attending the university in 1872 and in 1873 he listed the town of Groesbeck as his home. He attended the university before it merged with Baylor University, then located in Independence, in 1886. Foster was one of the leaders in the negotiation for the merger of the two universities into Baylor University in Waco.

Foster moved to Groesbeck in November 1873, starting a newspaper, the Limestone New-Era, on November 19, 1876. He was the papers editor, proprietor, and publisher. He soon after entered politics, leaving the paper in 1890, when it began to consume too much of his time. He was a founding member and the seventh president of the Texas Press Association in Austin from 1886 to 1887. During his term as president of the press association, Foster and Charles E. Gilbert purchased the Dallas Herald on June 7, 1886. Foster sold his interest in the paper to Gilbert later the same year.

He ran for the Texas House of Representatives for the 42nd district in 1880, winning the election and was inaugurated in 1881. He later on went to represent the 62nd district after redistricting. In 1883, he was the chair of the House Committee on Public Printing. He was the speaker of the Texas House of Representatives from 1885 to 1887. An 1885 biography of Foster notes

From obscurity and poverty he struggled up the rugged heights to distinction and a place in the hearts of his colleagues in the legislature, his constituents and the people of the Lone Star State. By industry, economy and firmness of purpose, he has gained a competency; built himself a home, and properly utilized and developed the intellect which God has given him. In England and other foreign countries where the possession of wealth and rank is almost absolutely necessary for the rapid rise of young men to political distinction, many poor young men of genius give up the struggle in despair, and turn aside into the sterile and beaten paths of life and never accomplish the destinies for which the Architect of nature intended them; but, in this land of Democratic liberty the talents of men are appreciated, the road that leads to honor is well defined and open to all men mentally able to climb its steep ascent. The lives of such men as the distinguished Speaker of the Nineteenth Legislature, contain a moral that the most ignorant man may read and one that should stimulate the young men of Texas, who thirst for the laurels that crown the brow of successful merit, to earnest and untiring effort. [sic]

He was the youngest-ever to hold the position at the time. He was appointed as the Commissioner of Agriculture, Insurance, Statistics and History by Governor Lawrence Sullivan Ross and was reappointed to the position by Governor Jim Hogg on January 22, 1891. As commissioner, Foster organized the First Annual Report of the Agricultural Bureau of the Department of Agriculture, Insurance, Statistics, and History. He also worked with Hogg to harry illegally operating insurance companies out of Texas. Hogg then appointed Foster, known for his attention to detail and large store of knowledge about railroad affairs, as a member of the first Railroad Commission of Texas, which was established to regulate shipping rates and practices, later the same year. He was the railroad commissioner until 1895, when he became the vice president and general manager of the Velasco Terminal Railway. Foster later resigned from this position in 1898 to work for the successful gubernatorial campaign of Joseph D. Sayers, as the Chairman of the Sayers Central Campaign Committee. In the summer of 1898, he was appointed as the President of the Agricultural and Mechanical College of Texas by the Board of Directors of the college. He served in this position for three years, until his death in 1901.

Foster became an unordained minister at the First Baptist Church, which he helped found in Groesbeck in 1873, the same year he moved to town. He was sent as a delegate from Groesbeck to the twenty-seventh Annual Session of the Baptist State Convention of Texas in Galveston, October 3 to October 6, 1874. Foster was appointed president of the Baptist General Association of Texas convention on July 24, 1885. He was also present during the meeting between the "board of trustees of Waco University, Baylor University and Baylor Female College with the committees appointed by the Texas Baptist State Convention and the Baptist General Association of Texas" at the "Baptist House of Worship, Temple, on December 9, 1885." At this meeting, he was also appointed "to present a basis for the consolidation of the schools." This committee decided