The United States Department of Justice states that harboring a fugitive can be considered either a felony or a misdemeanor. A person convicted of the crime is generally subject to imprisonment for up to one year, however, in some circumstances the penalty can be increased to up to five years in prison.
The Legal Information Institute of the Cornell University Law School notes that a criminal offense is a misdemeanor if the maximum applicable term of imprisonment is less than a year. A criminal offense is considered a felony if the maximum applicable term of imprisonment is more than a year.
According to The United States Department of Justice, harboring a fugitive is a felony only if the fugitive is convicted of any offense, if the warrant or process issued for the fugitive's arrest is on a felony charge, or if the harbored fugitive escaped from custody.