Although it's technically possible, more commonly used fuels for rocket propulsion are liquid hydrogen and kerosene due to their greater efficiency. 

You _could_ use water as a fuel source by passing it through an electrolytic process to separate hydrogen from oxygen. These gasses could then be used as fuel source and oxidizer respectively.
Keep in mind though, according to NASA's Marshall Space Flight Center, a rocket would need approximately 8.4 kilograms of hydrogen and 1.4 kilograms of oxygen per kilogram of payload to reach low Earth orbit. Meaning that a significant amount of water (approximately 10kg per kg of payload) needs to be used in order to generate enough fuel.
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