Is there a five star gen in marine corp?

Yes, the United States Marine Corps has a rank of five-star general, officially known as "General of the Marine Corps." However, this rank has been held by only one individual, General Alexander Vandegrift, during World War II. The five-star rank is not currently active and has not been conferred since Vandegrift. In general, the highest active rank in the Marine Corps is a four-star general.