Misdemeanor simple assault in a federal case carries a maximum penalty of 6 months in prison and potentially includes a fine of up to $1000. The maximum sentence for simple assault at the state level varies from state to state.
The conditions that determine what constitutes assault are defined differently in each state. Federal courts define assault differently from state and county courts. Some states require harm to be done in order for the incident to qualify as assault, while in other states simple assault is defined as mere intent to do bodily harm. Information on definitions and penalties in each state are available on a number of sites, including each state's official government Web page.