Nirmal Singh may refer to:
Nirmal Singh (Shutrana politician) from INC in Punjab, India Nirmal Singh Khalsa (1952–2020), Sikh Hazoori Ragi of Darbar Sahib Nirmal Singh (judge) (born 1947), MLA of Bassi Pathana Nirmal Kumar Singh (born 1956), BJP politician and deputy chief minister of Jammu and Kashmir Nirmal Singh (Haryana politician) (born 1953), Congress politician from Haryana Nirmal Singh Maharaj (1952-2007), Indian spiritual leader popularly known as "Guruji"