A Jacksonville, FL native, Rep. Costlow graduated from Lowndes County High School in 2005 and earned an MBA from Western Governors University in 2018.

Before joining the House, Rep. Costlow served as an alderman and board president for Dardenne Prairie, where he championed fiscal responsibility and passed safety measures to protect residents. Rep. Costlow intends to carry similar issues in the legislature, focusing on supporting economic growth, removing politics from classrooms, expanding school choices for families, and defending Missourians against federal overreach. He is dedicated to serving with integrity to ensure a bright future for Missouri.

Rep. Costlow is a family man, married to his wife, Jaycee, and enjoys spending his free time with her and their five children- Michael, Emily, Hanna, Elias, and Henry.