New York City law prohibits carrying a knife that can be seen in public, including wearing a knife outside of your clothing. This applies to all knives, even if the blade is not exposed. When any portion of the knife is visible, such as the clip, hinge or top, this is considered in public view. This rule does not apply to those who carry knives for work that customarily requires the use of such knife, members of the military, or on-duty ambulance drivers and EMTs while engaged in the performance of their duties.
New York City also prohibits the possession in public of a knife with a blade that is 4 or more inches regardless of whether any part of the knife, including the blade, is visible or concealed. This rule does not apply to those who carry knives for work that customarily requires the use of such knife, members of the military, or on-duty ambulance drivers and EMTs while engaged in the performance of their duties.