June A. McCarroll was born in Elkhorn, Wisconsin. Her early life and upbringing remain relatively obscure, but her later achievements suggest a strong character and dedication to service, perhaps instilled during her formative years in the Midwest.

June McCarroll established herself as a physician. While specific details of her medical practice are not extensively documented, her profession likely instilled in her a strong sense of public health and a commitment to preventing injury and saving lives. This commitment would later translate to her advocacy for road safety improvements.