Adam Ružička (born May 11, 1999) is a Slovak professional ice hockey centre currently playing as a prospect for the Calgary Flames of the National Hockey League (NHL).
Growing up in Slovakia, Ružička trained at various hockey schools before joining the HC Pardubice U20 team. While with the U20 team, Ružička accumulated 30 points through 30 games, before representing Slovakia at the IIHF World U18 Championship. His offensive abilities earned him attention from the Kontinental Hockey League (KHL) and he was eventually drafted 14th overall by the HC Slovan Bratislava in the KHL Junior Draft. However, Ružička chose to move to North America and play with the Sarnia Sting and Sudbury Wolves of the Ontario Hockey League.
On 29 May 2024, Ružička was signed to a one-year contract by Spartak Moscow of the Kontinental Hockey League (KHL)