[2] A member of the Republican Party, he formerly served as the Speaker pro tempore of the South Dakota House of Representatives.

[6]  Six years later, Hansen's mom remarried and his family moved to Dell Rapids, South Dakota where he grew up along with his two sisters.

[9][10] In 2010, Hansen defeated incumbent Democrat Oran Sorenson, winning a seat in the South Dakota House of Representatives.

[13] Upon Hansen's departure, Governor Dennis Daugaard said, "in his second term, Jon has already stood out as a leader, and I hope to see him return to public service in the future.

"[13] In 2018, Hansen returned to the South Dakota House of Representatives by defeating incumbent Democrat Dan Ahlers.

[15] Hansen Represents South Dakota's 25th Legislative District, which "includes the towns and rural areas surrounding Baltic, Colton, Dell Rapids, Garretson, Lyons, Rowena, Sherman, Split Rock Township, Valley Springs, and eastern Sioux Falls.

[20] In 2019, Hansen received the Americans for Prosperity Torchbearer Award "for his tremendous record of voting to break down barriers for South Dakotans and for his sponsorship of legislation to expand education opportunities for our students.

[26] In 2019, Hansen sponsored House Bill 1193, which "provide[s] a criminal penalty for causing an abortion against a pregnant mother's will.

[31] In 2013, Hansen co-sponsored House Concurrent Resolution 1002, urging the United States Supreme Court to revisit the Roe v. Wade case and to overturn its decision.

[33] The 72-hour waiting period requirement was passed into South Dakota law in 2011 via House Bill 1217, which Hansen also co-sponsored.

"[35] The pregnancy help center also conducts a private interview with the pregnant mother to help ensure that she is not being coerced into making her decision to abort her unborn child.

[39] Hansen "has been endorsed three times by the NRA and has received an 'A' rating from the Association because of his 'demonstrated record of support on Second Amendment issues.

'"[40] In 2019, Hansen supported Senate Bill 47, which allows individuals in South Dakota to carry a concealed weapon without a permit.