Khawāja Uthmān Khān Lōhānī (Bengali: খাজা উসমান খাঁন লোহানী), popularly known as Khwaja Usman, was a Pashtun chieftain and warrior based in northeastern Bengal. As one of the Baro-Bhuyans, he was a zamindar ruling over the northern parts of Bengal including Greater Mymensingh and later in South Sylhet. He was a formidable opponent to Man Singh I and the Mughal Empire, and was the last of the Afghan chieftains and rulers in Bengal. His defeat led to the surrender of all the remaining Pashtuns as well as the incorporation of the Sylhet region into the Bengal Subah. He is described as the most romantic figure in the history of Bengal. His biography can be found in the Baharistan-i-Ghaibi, Tuzk-e-Jahangiri as well as the Akbarnama.