| Type: | Bishop |
| Honorific-Prefix: | His Excellency |
| Karl-Heinz Wiesemann | |
| Bishop of Speyer | |
| Diocese: | Diocese of Speyer |
| Appointed: | 19 December 2007 |
| Term Start: | 2 March 2008 |
| Predecessor: | Anton Schlembach |
| Ordination: | 10 October 1985 |
| Ordained By: | Cardinal Franz König |
| Consecration: | 8 September 2002 |
| Consecrated By: | Joachim Wanke |
| Birth Date: | 1 August 1960 |
| Birth Place: | Herford, West Germany |
| Nationality: | German |
| Partner: | --> |
| Motto: | Major Omni Laude |
| Coat Of Arms: | Coat of arms of Karl-Heinz Wiesemann.svg |
Karl-Heinz Wiesemann (born 1 August 1960) is the 96th Bishop of Speyer.
Wiesemann was born in Herford, North Rhine-Westphalia in the archdiocese of Paderborn. He became a chaplain on 10 October 1985 in Rome. He later served as a priest in Bösperde, a suburb of Menden and provost of St. Petrus and Andreas in Brilon.
In 2002 Pope John Paul II named him Auxiliary bishop, to which he was ordained on 8 September 2002 in Paderborn Cathedral.
On 19 December 2007 Pope Benedict XVI named him the successor to bishop Anton Schlembach. He was installed to the office on 2 March 2008 in Speyer Cathedral.
In January 2014, Wiesemann supported married priests in Roman-Catholic Church.[1] In February 2022, Wiesemann supported blessings of same-sex unions.[2] He promised to respect the consciences of priests who refuse to bless the unions, while asking them to refer the couples to the diocesan office. This office would then contact another priest willing to bless the union. Remarried couples are to be treated the same way.[3]