Plug detection mechanisms can be provided for detecting when a plug of an accessory component is present within a jack of an electronic device. A detect contact and a jack contact may be positioned within a receptacle of the jack such that a signal path may be created through the plug and between the detect contact and the jack contact when the plug is present within the receptacle of the jack. The detect contact may be biased to exert a retention force on the plug. The detect contact may be positioned to contact the plug within an indent of the plug.