Dr. Charles F. Warner was for more than forty years one of the most respected and skilled physicians in southern Minnesota. His death removed from Mankato not only its oldest practicing doctor, but a surgeon and civic health leader whose influence extended across the Minnesota Valley.

He was born August 30, 1832, in Genesee County, New York, the son of Dr. Eben Warner (1801–1852) and Hannah Fowler Warner. Raised in a medical household, he studied first under his father and received his literary education at the Wesleyan Seminary in Lima, New York. He graduated from Jefferson Medical College in Philadelphia in 1854 and began practice in Livingston County, New York.

In June 1854 he married Esther S. Towne (1832–1913). Two children survived to adulthood: Clayton E. Warner (1857–1902) and Lillaette Warner (1859–1940), the latter later marrying Harry E. Baker.

During the Civil War, Dr. Warner entered service as assistant surgeon of the 136th New York Infantry. He was mustered in September 26, 1862, but ill health forced his discharge in early 1863. Though his military career was brief, it reflected his willingness to serve during the nation’s crisis.

In the autumn of 1869, Dr. Warner moved west to Mankato, Minnesota, where he would spend the remainder of his professional life. From that time forward, he built a reputation as one of the most conscientious and skillful physicians in the state. His practice in Mankato extended over forty years, making him the city’s oldest active physician at the time of his death.

He served two terms as County Physician of Blue Earth County and held the office of City Health Officer for twelve years, playing a critical role in safeguarding public health during an era when epidemics and sanitation concerns were constant threats. He was a prime mover in the founding of the Minnesota Valley Medical Association and remained actively involved in its work for twenty-four years, serving in leadership roles including vice president. He was also affiliated with state and national medical societies.

From 1882 onward, Dr. Warner served as local surgeon for both the Chicago, Milwaukee & St. Paul Railway and the Chicago & North Western Railway, further broadening his professional responsibilities.

Colleagues described him as possessing “abilities of the highest order.” He was widely recognized as a skillful surgeon and a painstaking, conscientious physician. His dedication to his practice was tireless—perhaps too much so. His final illness was attributed to a complication of ailments aggravated by close confinement to business and the natural decline of advancing age.

Dr. Warner died just short of his seventy-seventh birthday. His passing was deeply felt throughout southern Minnesota, where he had ministered to generations of families.

He rests in Glenwood Cemetery in Mankato, among the civic and professional leaders of the community he served faithfully for four decades. His life stands as a testament to nineteenth-century medical dedication — from rural New York, through wartime service, to a lifetime of healing on the Minnesota frontier.