Thies Christophersen (27 January 1918 – 13 February 1997) was a German neo-Nazi publisher, SS-officer, and pamphleteer of Holocaust denial literature. His activism, which included unabashed support of Nazi Germany and self-styled Reichstag meetings, are generally considered an early precursor to the Reichsbürger movement.

Christophersen was born in Kiel to a farming family residing in Kälberhagen near Mohrkirch. After completing compulsory school attendance, he was trained in agriculture to become a full-time farmer.

In 1931, Christophersen joined Deutsches Jungvolk, a suborganisation of the Hitler Youth. On 25 October 1937, he joined the Nazi Party (NSDAP number 4.765.641). In autumn 1939, Christophersen enlisted in the Wehrmacht to serve as a private on the Western Front during World War II, but he was removed from combat duty the following year due to a facial injury that left him with a "children's fist-sized" indentation at the nasal root. After reassignment to civil service in German-occupied Ukraine, Christophersen joined the Waffen-SS in 1943, where he received the rank of Sonderführer.

By 1944, Christophersen worked for the research department of the SS Main Office. In January of the same year, he was assigned to the natural rubber production program of Joachim Caesar [de], at the gardening sector of the livestock farm facility Rajsko, a subcamp of KZ Auschwitz, which was located three kilometres (1.9 mi) from the farming site. Staff identified Christophersen as a supervisor at the Russian dandelion greenhouses, where he frequently interacted with the roughly 300 female prisoners labouring as horticulturists, who had nicknamed him "Locher" ("hole puncher"). He personally picked several of them for the work during selection, as well as several Romani prisoners that would play music at his command. He did not, however, interact with the farmhands on the fields, who were frequently beaten on the spot for low productivity.

According to Christophersen, shortly after his arrival at Auschwitz, he had been told of the mass burning of Jewish prisoners by a Polish camp maid named Olga. When he asked fellow SS personnel about this, Christophersen stated that they "responded with shrugs of the shoulder and 'don't pay attention to these rumors'". He then insisted that, being in close proximity to the area, he would have been certain to identify mass killings and claimed that he never witnessed or was made aware of any such incidents. In a memoir, Christophersen wrote that he "experienced no atrocities or executions and neither [noticed] gas chambers nor flames from crematorium chimneys", describing his own stay as "pleasant". Although he never left Rajsko during his twelve-month station, in Die Auschwitz Lüge, he claimed to have toured the whole of Auschwitz II-Birkenau and Monowitz, and that prisoners were well-fed, sung while working, and that Jewish workers were dressed in "fancy stolen clothes". Christophersen acknowledged unsanitary and overcrowded conditions in Birkenau, but defended the presence of child prisoners at the subcamp, stating that it was "kinder" by Nazi authorities to keep them with their arrested parents. He also denied that Auschwitz had forced labour, claiming selection was merely a voluntary process for internees who "wanted to be occupied". He further described the prisoners, particularly the Polish and Jewish ones, as anti-communists who "prayed for German victory".

In 1945, after the surrender of Nazi Germany, Christophersen lied during his denazification process that he did not have Nazi Party membership and was released with the classification Mitläufer. He returned to Kiel, where he initially assumed ownership of his father's farm, also publishing articles on farming as an agricultural journalist. During the 1950s, Christophersen successively joined and left several right-wing parties, initially the Christian democratic CDU party, then the national conservative German Party and briefly the neo-Nazi NPD party, all of which he denounced as "too democratic, too lax".

In 1965, Christophersen wrote and published the monthly polemic magazine Deutscher Bauer ("German Farmer"), which was politically aligned against the local CDU-majority farmer's league. Despite its small readership of some 2000 and locally limited circulation, the magazine was sold in 1968 on 17 June to Gerhard Frey, who published it as part of his extreme right newspaper Deutsche National-Zeitung. However, as Christophersen was now relegated to writing advertising material rather than opinion pieces, he filed a legal case against Frey on 14 November, which resulted in Christophersen getting fired. The case went on for a month until both parties withdrew on 31 December after a private settlement, though Christophersen continued to comment negatively on his business relation with Frey. In 1969, he handed control of his farm to his son and founded the brochure Die Bauernschaft ("The Farming Community"), in which Christophersen disseminated further Holocaust-denying material. The brochure was distributed through a self-owned publishing house, Kritik-Verlag, and book trader, Nordwind. In his writings, Christophersen denounced the German constitution, accused guest workers of "weaponizing their natural fertility" and called for the establishment of a Fourth Reich.

Throughout the 1960s and 1970s, he forged close contacts, both domestically and internationally, with other proponents of the "Auschwitz lie" such as Udo Walendy, Robert Faurisson, David Irving, Otto Ernst Remer, and Florentine Rost van Tonningen, and with Stille Hilfe ("Silent Help"), an organisation assisting neo-Nazi activists. Christophersen appeared as a witness in the trial of Ernst Zündel in Canada.