Henrikas Danilevičius, also widely known as Vidmantas (18 July 1922 – 1 November 1949) was a teacher, Lithuanian partisan, and one of the commanders of the Kęstutis military district.

In 1944, as the war was coming to an end, Danilevičius was betrothed to medic Sofia Jurgelionytė and traveled to Žemaitija to his relatives to invite them to the upcoming wedding.

After the persecution of Soviet security increased, he briefly went into armed resistance, but after the suspicions subsided, he returned to work as a teacher.

After fear of being tracked down by Soviet agents, in 1946 he went into the underground resistance, publicly declaring that he was shot by partisans for being the director of a high school.

In 1946, among other partisan leaders, he established the Kęstutis military district (whose head at the time was Juozas Kasperavičius).

By 1947, he was stabilizing the organized resistance and its organizational structure, also being officially declared the leader of the Lydis company in the same year.

Although he survived, due to his arbitrary decision to leave for Kaunas the western partisan leadership removed him from his post.

Despite provocations by the MGB (attempting to sow distrust with individual partisans instead of physically eliminating them), close colleagues assured that Danilevičius was not a traitor.