Stonko was sworn into the Maryland House of Delegates on January 11, 2023. He is a member of the House Appropriations Committee. During his tenure, Stonko has been critical of the fiscal impacts of the
Blueprint for Maryland's Future, referring to the program as the "Blueprint to Bankrupt Maryland's Future". In March 2025, he voted to undo proposed cuts to the Blueprint's collaborative time program, saying that while he opposed the program, cutting funding for it could lead to class sizes of 50 students to one teacher in parts of Carroll County. In February 2026, Stonko was one of three Republicans delegates to support a bill that would prohibit
investor-owned utilities from paying employee bonuses and supervisor compensation with ratepayer dollars. Stonko did not run for re-election to a second term in
2026, endorsing small business owner Steve Patten to succeed him. ==Electoral history==