Abstract: In accordance with some embodiments, systems, methods, and media for monitoring a state of a fifth wheel are provided. In some embodiments, the system comprises: a vibration sensor configured to be mounted to a portion of the fifth wheel; and one or more hardware processors configured to: provide a frequency domain representation of a sample of vibration data recorded using the vibration sensor to a trained machine learning model that is trained to predict a state of a fifth wheel based on vibrations of the fifth wheel; receive, from the trained machine learning model, an output indicative of a predicted state of the fifth wheel at the time that the sample of vibration data was recorded; and transmit a signal to an external device that is indicative of a current predicted state of the fifth wheel.