Christopher Henrik Holfeldt Tostrup (20 September 1804- 17 October 1881) was a Norwegian timber merchant and land-owner.
Tostrup was born at Hjelmeland in Rogaland, Norway. He was the son of infantry captain Nicolai Tostrup (1768–1858) and his wife Thale Margrethe Resen Holfeldt (1779–1860). He was one of eight siblings in a family which included goldsmith Jacob Tostrup (1806–1890) and politician Hans Tostrup (1799-1856) .
In 1842, he co-founded the Tostrup & Mathiesen company, one of the largest such companies in Norway. His heirs sold the Tostrup & Mathiesen company to the Mathiesen family in 1892. It was subsequently renamed Mathiesen Eidsvold Værk, and much of the company is today continued under the name Moelven Industrier.
From 1870, Tostrup also owned the manor house Kjellestad at Stathelle in Telemark. Christopher Tostrup was married to Julie Camilla Schaft (1814–1897) who was a daughter of Andreas Schaft. They had three sons and four daughters. He was the grandfather of art collector and philanthropist Christopher Tostrup Paus.