Kim's parents have been consistently described as supportive, although initially confused and concerned by her early expressions of gender identity. Their willingness to learn and adapt played a vital role in her transition journey.

Kim Petras has generally maintained a private personal life, rarely discussing romantic relationships or personal matters in interviews or on social media. She has prioritized her career and creative work. This has allowed her to protect herself from additional scrutiny given her visibility as a transgender artist.

While private about specific relationships, Petras has spoken extensively about her experience as a transgender woman, advocating for LGBTQ+ rights and visibility. She often discusses the importance of self-acceptance and encourages other transgender individuals to live authentically. She has mentioned having faced challenges with dating due to societal biases and transphobia.

Petras has formed close friendships with several artists in the music industry, as evidenced by public appearances and collaborations. These friendships provide support and solidarity in navigating the often-challenging music scene.