Is a false statement a felony in Maryland

You are going to have to be more specific about the nature of the false statement - who was it made to and under what circumstance. For example was it a false statement made under oath in court, or made to a federal investigator, or on a credit application? And also was the statement of material consequence - i.e. did it impede an investigation?

No, not every lie is a crime. Anywhere.

As Ebaines suggests, you have to be more specific.