Hans Peter Wieselgren (born March 26, 1952) is a Swedish Olympic épée fencer. He competed for Sweden in the team épée event at the 1972 Munich Olympics, and was the 1977 NCAA épée champion.
Born in Gothenburg, Sweden, Wieselgren competed for Sweden in the team épée event at the 1972 Munich Olympics. The team came in seventh, behind Poland and ahead of the United States.
Two years after the Olympics, Wieselgren moved to the United States (where he has remained) and attended New York University (NYU) on scholarship, where he was in the class of 1977. He fenced épée for the university's NYU Violets. In 1974, he was the Intercollegiate Fencing Association épée runner-up. In 1976, he led NYU to the NCAA Fencing Team Championship, and came in second in individual épée. In 1977, he was the NCAA épée individual champion.
Wieselgren is currently the épée fencing coach at Morristown High School in Morristown, New Jersey.
Wieselgren was inducted into the NYU Hall of Fame in 1977.