Niselovich (Niselowitsch) Aron Borisovich (31 May 1925, Bauska – 5 August 1983) — lawyer.

From 1933 to 1944, Aron Niselovich was a cadet of the 1st Latvian Reserve Artillery Regiment. In 1944, he fought on the 2nd Baltic Front as part of the 308th Latvian Guards Division. In 1945, he was demobilised as a Group III war invalid.

In 1950, Niselovich graduated from the Faculty of Law of the Latvian State University. From 1950 to 1951, he served as executive secretary of the political department at the editorial office of the Madonna city press organ. Between 1951 and 1956, he taught at Bauska Secondary Schools Nos. 1 and 2. From 1957 to 1958, he worked as a forensic expert at the Riga Scientific Research Forensic Laboratory.

In 1958, he was admitted to the bar as a trainee; in 1959, he was enrolled as a practising lawyer in the Latvian Bar Association, where he worked until his death in 1983. In addition to his professional duties, he provided consultations on political issues, participated in the preparation of wall newspapers, and carried out shifts at polling stations.

He was a member of the All-Union Leninist Young Communist League (VLKSM) from 1942 to 1955 and a member of the Communist Party of the Soviet Union (CPSU) from 1955.