Rose Wilder Lane (December 5, 1886 – October 30, 1968) was an American writer and daughter of American writer Laura Ingalls Wilder. Along with two other female writers, Ayn Rand and Isabel Paterson, Lane was one of the more influential advocates of the American libertarian movement.

Lane was the first child of Laura Ingalls Wilder and Almanzo Wilder and the only child of her parents to survive into adulthood. Her early years were a difficult time for her parents because of successive crop failures, illnesses and chronic economic hardships. During her childhood, the family moved several times, living with relatives in Minnesota and then Florida and briefly returning to De Smet, South Dakota before settling in Mansfield, Missouri in 1894. There, her parents eventually established a dairy farm and fruit orchards. She attended secondary school in Mansfield and Crowley, Louisiana while living with her aunt Eliza Jane Wilder, graduating in 1904 from Crowley High School in a class of seven. Her intellect and ambition were demonstrated by her ability to compress three years of Latin into one and by graduating at the top of her high school class in Crowley. Despite her academic success, she was unable to attend college as a result of her parents' financial situation.

After high school graduation, Lane returned to her parents' home in Mansfield and learned telegraphy at the Mansfield railroad station. Not satisfied with the options open to young women in Mansfield, by early 1905 she was working for Western Union in Sedalia, Missouri. By 1906, Lane was working as a telegrapher at the Midland Hotel in Kansas City, Missouri. Over the next five years, Lane worked as a telegrapher in Missouri, Indiana and California.

In 1908, Lane moved to San Francisco, where she worked as a telegrapher at the Fairmont Hotel. In March 1909, Lane married salesman, promoter and occasional newspaperman Claire Gillette Lane. Evidence suggests the Lanes had met back in Kansas City and Lane's diary hints that she moved to San Francisco to join her future husband. Shortly after they wed, Lane quit her job with Western Union and the couple embarked on travels across the United States to promote various schemes. Lane soon became pregnant. While staying in Salt Lake City the following November, Lane gave birth to a premature, stillborn son, according to public records. Subsequent surgery in Kansas City likely left her unable to bear children. The topic is mentioned only briefly in a handful of existing letters written by Lane years after the infant's death in order to express sympathy and understanding to close friends who were also dealing with the loss of a child.

For the next few years, the Lanes continued to live a nomadic lifestyle, including stays in Missouri, Ohio, New York and Maine to work together and separately on various promotional and advertising projects. While letters to her parents described a happy-go-lucky existence, Lane's subsequent diary entries and numerous autobiographical magazine articles later described her mindset at this time as depressed and disillusioned with her marriage. She felt her intellectual interests did not mesh with the life she was living with her husband. One account even had her attempting suicide by drugging herself with chloroform only to awake with a headache and a renewed sense of purpose in life.

During these years, Lane, keenly aware of her lack of a formal education, read voraciously and taught herself several languages. Her writing career began around 1908, with occasional freelance newspaper jobs that earned much-needed extra cash. In 1913 and 1914, the Lanes sold farmland in what is now the San Jose/Silicon Valley area of Northern California. Conditions often required them to work separately to earn greater commissions and of the two, Lane turned out to be the better salesperson.^{[clarification needed]} The marriage floundered as there were several periods of separation and eventually an amicable divorce. Lane's diaries reveal subsequent romantic involvements with several men in the years following her divorce, but she never remarried and eventually chose to remain single and free of romantic attachments.

The threat of America's entry into World War I had seriously weakened the real estate market, so in early 1915 Lane accepted a friend's offer of a stopgap job as an editorial assistant on the staff of the San Francisco Bulletin. The stopgap turned into a watershed. She immediately caught the attention of her editors not only through her talents as a writer in her own right, but also as a highly skilled editor for other writers. Before long, her photo and byline were running in the Bulletin daily, churning out formulaic romantic fiction serials that ran for weeks at a time. Lane's first-hand accounts of the lives of Henry Ford, Charlie Chaplin, Jack London and Herbert Hoover were published in book form.

Later in 1915, Lane's mother visited San Francisco for several months. Together they attended the Panama–Pacific International Exposition. Details of this visit and Wilder's daily life in 1915 are preserved in Wilder's letters to her husband in West from Home, published in 1974. Although Lane's diaries indicate she was separated from her husband in 1915, her mother's letters do not indicate this. Lane and her husband are recorded as living together with him unemployed and looking for work during her mother's two-month visit. It seems the separation was either covered up, or had not yet involved separate households.^{[citation needed]}