The Heilongjiang Military District (; full name People's Liberation Army Heilongjiang Military District or PLA Heilongjiang Military District) is a military district of the National Defense Mobilization Department of the Central Military Commission in China.
On April 27, 1949, the Northeast Military Region mandated the amalgamation of the Heilongjiang Military Department () and the Nenjiang Military Department to establish the Heilongjiang Military Department, headquartered in Qiqihar, while the Songjiang Military Department and the Hejiang Military Department were consolidated to create the Songjiang Military Department, based in Harbin. On January 20, 1953, the Northeast Military Region mandated the transformation of the Heilongjiang Military Department into the Heilongjiang Military Region and the Songjiang Military Department into the Songjiang Military Region. In June 1954, pursuant to the Central People's Government's "Provisions on the Abolition of Administrative Institutions at the Regional Level and the Merger of Certain Provincial and Municipal Establishments" (), and in accordance with directives from the Central Military Commission and the Northeast Military Region, the Heilongjiang and Songjiang Military Regions were consolidated to establish the new Heilongjiang Military Region, headquartered in Harbin City.