The National Society Daughters of the American Revolution (NSDAR or DAR) is a non-profit, non-political, volunteer women's service organization. DAR was founded in 1890 as a National Society and has provided leadership in the fields of conservation, citizenship, genealogy, family history, education and educational scholarships, historical American studies, and service to veterans.

In 1905, twelve prominent area women joined together to form a DAR chapter in Mason City, Iowa. The charter was applied for and received April 7, 1905. By 1920, there were twelve meetings a year and 54 members. In 1925, the chapter membership increased to 92. This provided more hands and minds to carry out the NSDAR objectives. Back in the early years of the chapter, the chapter meetings were historical, educational, and patriotic. This is still true today. Each February in the early years, a George Washington Colonial Tea was observed. Members dressed in colonial period attire, making the event an elegant one. In 1925, the chapter had a naturalization committee that took part in naturalization classes and ceremonies at the Mason City Court House. In the 1930s, a chair for Constitution Hall was purchased with profits from rummage sales. During World War II, the chapter collected and sold old paper and magazines for 25 cents per pound to support defense, and contributed blood, time, money, and many other items for the local Red Cross. Some members were unable to attend meetings during the war due to gas rationing.

Through the years, American Flags have been donated to scout troops, museums, schools, and nature centers. For years, sewing materials, yarn, and manuals of United States history were sent to Ellis Island to help women and children in the detention center.

Today we continue to promote historic preservation along with encouraging active participation in educational and patriotic endeavors. Recent projects include Hero Baskets for local law enforcement and first responders to thank them for their service. Military veterans are also a focus for the Mason City Chapter, NSDAR, with our November thank you project and the holiday sock collection for veterans in care centers and the VA Clinic.

The Mason City Chapter, NSDAR, remains an active chapter, striving to fulfill the goals of our national and state societies with pride.