Emidio "Mimi" Soltysik (/ˌsɒlˈtɪsɪk/ soll-TISS-ik; October 30, 1974 – June 28, 2020) was an American socialist political activist. He was the Socialist Party USA's presidential nominee in the 2016 election, with Angela Nicole Walker, who was the party's vice-presidential nominee.

From October 2013 to October 2015, Soltysik served as national co-chair of the Socialist Party USA. He was also the state chair of the Socialist Party of California from its chartering in 2011 until 2017.

Soltysik was born in Reading, Pennsylvania. After high school, Soltysik became a professional musician until his mid-thirties. Speaking of that period, he said in an interview: "I was incredibly self destructive, self absorbed, and almost entirely focused on instant gratification. By the time I reached my early 30s, I felt as if I had bottomed out. Substance abuse had taken a heavy toll on my health, both physically and mentally, and I found myself in a position where I was essentially starting from scratch."

Soltysik then returned to higher education and graduated from Troy University and then went on to earn an MPA degree at California State University, Northridge. He later said "I came to the conclusion that, if the first half of my life was spent tearing humanity down, the second half of my life would be dedicated to making a substantive difference." On June 28, 2020, Soltysik died after a prolonged struggle with liver cancer.

Soltysik was elected as the male co-chair of the Socialist Party USA for the 2013–2015 term at the party's 2013 national convention. He was also the chair of the Socialist Party of California.

In 2014, Soltysik was one of eight candidates in the primary for California's 62nd State Assembly district. Under California's nonpartisan blanket primary system, the top two candidates from the primary, regardless of party, advance to the general election. Soltysik finished in 7th place with 2.5% of the vote.

In October 2015, Soltysik filed a Federal lawsuit against the California Secretary of State because he had been required to list "Party Preference: None" on the 2014 primary ballot; the California election law allows candidates to list only a party preference of a qualified party or "None" on the ballot, and the Socialist Party was not a qualified party in California. Soltysik argued that restricting which parties could appear on ballots was unconstitutional. The U.S. District Court for the Central District of California dismissed the case in April 2016, finding that the ballot-label restrictions were justified by California's desire to protect the integrity of their elections. Soltysik appealed and the case was heard by the Court of Appeals for the Ninth Circuit. In 2018, they reversed the District Court's decision and remanded the case. Shortly after this, Soltysik's health began to worsen and he withdrew his lawsuit.

In April 2016, Soltysik was interviewed on CNBC regarding growing support for socialism in the United States.