Thomas Biesinger (December 20, 1844 – May 9, 1931) was a German convert to the Church of Jesus Christ of Latter-day Saints (LDS Church) and a Mormon missionary to the Austro-Hungarian Empire. Biesinger was the first Mormon missionary to preach in the present-day Czech Republic and Hungary. Biesinger was born in Wiesenstetten, Württemberg, German Confederation. In 1862, he was taught about Mormonism from LDS Church missionaries and was baptized into the LDS Church in Lake Constanze. In 1865, Biesinger emigrated to Utah Territory in the United States, settling in Lehi.