Ronstadt was born in Las Delicias, in the municipality of Banamichi, Sonora, Mexico, in 1868, the son of Margarita Redondo y Vásquez and Friederich August Ronstadt. He moved to Tucson in 1882 to learn the blacksmithing and wheelwright trades. He eventually formed the F. Ronstadt wagon and carriage company, which later changed its name to the F. Ronstadt Hardware and Machinery Company and became the largest business of its kind in southern Arizona. Though he declined many invitations to run for high political offices, Ronstadt was an active community leader. He served a two-year term on the Pima County Board of Supervisors, was chairman of the Water and Agricultural Committee of the Tucson Chamber of Commerce, a member of the Tucson Rotary Club and supported numerous political campaigns and causes. Music was essential to his life. A guitarist and vocalist, he founded what was probably Tucson's first professional orchestra, the Club Filarmonico Tucsonense, in 1896. In the mid-1920s Ronstadt was among the organizers of the Tucson Symphony Orchestra and he directed a production of Victor Herbert's The Red Mill. Music and stories always filled Ronstadt's home and inspired his children and grandchildren. He was married twice. Once to Sara Levin, the daughter of Tucson City Pioneer Alexander Levin and Zenone/Zenona Molina. Levin was born a Jew in Bahn, Prussia, he later converted to Catholicism, his wife's religion. Together Federico and Sara had four children Luisa, Laura, Frederick, and Alicia. He was married a second time to Maria Guadalupe Agustina Dalton, who was of one-quarter English and three-quarters Mexican ancestry. Federico and Maria had four children together William, Alfred, Gilbert, and Edward. Federico's daughter, Luisa, professionally known as Luisa Espinel, and granddaughter, Linda Ronstadt, became internationally acclaimed singers. Linda paid tribute to her creative family tradition by publishing works entitled Canciones de mi padre. Ronstadt remained active in business, writing and music up to his death in 1954. The City of Tucson dedicated its central transit terminal to Ronstadt on March 16, 1991, for his early contribution to the city's mobility which included six mule-drawn streetcars delivered in 1903–1904. Noted historian David Leighton honored the Ronstadt family in January 2020 by naming two streets, Corte de Federico and Calle de Lupe on property that used to be the family's homestead, at Prince Road and Tucson Blvd. The Tucson Musicians Museum is dedicated to the legacy of Ronstadt for his fundamental contributions to Tucson's cultural identity.
