Lorentz Wilhelm Brinch (9 May 1910 – 20 May 1953) was a Norwegian barrister, military officer, banker and politician for the Conservative Party.

He was born in Kristiania as a son of barrister Christian Nicolay Brinch (1861–1946) and Anna Catharina Rolfsen (1870–1947).

In 1942 he married Anna Marta Ida Elisabeth Højer, daughter of the then-Swedish ambassador to Norway.

[1] During the subsequent occupation of Norway by Nazi Germany he was the leader of Milorg district 13 (D13), from 1944 to 1945, succeeding Oliver H. Langeland.

The D13 district covered Oslo, Aker, Bærum and Asker, and had a total of about 7,000 soldiers at the end of World War II.