User-wearable remote speaker mic (RSM) holders for positioning a remote speaker mic relative to the mouth of the wearer are disclosed as well as a wearable radio support system including the same. The RSM holders include an elongate body having a first end and a second end and a first major side extending from the first end to the second end, and RSM attachment member positionable along the length of the first major side. The first end of the elongate body is releasably attachable to or is permanently attached to a donnable article of clothing or donnable gear, and a first attachment member is positioned at or proximate the second end of the elongate body and is connectable to a feature of the donnable article of clothing and/or the donnable gear.