Christian Birch-Reichenwald (4 January 1814 – 8 July 1891) was a Norwegian jurist and politician who served as mayor of Oslo, Norway. He was born at Blaker in Akershus, Norway. He was the son of to Paul Hansen Birch and Anna Catharina Hoffmand Stenersen. He married Jacobine Ida Sophie Motzfeldt, daughter of Peter Motzfeldt and niece of his own mother. The couple had two children; Anna Ernesta (born 1839) and Peter (born 1843).