A review of the vapor−liquid phase transitions of confined fluids is presented with emphasis on recent experimental findings that have direct implications on modeling. Experimental methods to investigate the phase transition of confined fluids are also discussed. Although adsorption/desorption experiments are the most common and important methods in this field, other new methods are developed to investigate properties and behaviors that are not easily done using adsorption/desorption, such as the recent isochoric-cooling experiments using differential scanning calorimetry (DSC) that provide new findings and insights into different aspects of phase transition of confined pure fluids and mixtures, as well as experiments using nanofluidic devices that gain some attentions due to their ability to visually observe what is happening in the pores. For the modeling, engineering equations of state, which are the most attractive models for industries, are discussed. Although some promising results of these equations of state have been achieved, a lot of work still needs to be done as new findings have been experimentally unveiled. Future experiments needed for deeper physics understanding and better model development on nanoconfined fluids are identified.