Ironsides is an unincorporated community or "post village"[1] in Charles County, Maryland, United States with zip code 20643.

[5] The origin of the name of the town is unclear; it is either a reference to the Frigate USS Constitution, known as "Old Ironsides", or to iron siding on a house renovated there in 1886.

In 1966, the Ironsides Rescue Squad Inc. was declared by the State of Maryland to be in forfeiture for payment of taxes or filing an annual report.

[16] In 1948, Maryland became the twentv-first state to join the "American Tree Farm" movement, with the dedication of a 1,278-acre tract of forest owned by the Glatfelter Pulpwood Company, still a major landholder in the Ironsides area.

[17] In 1953, a 27-year-old volcanologist who grew up in Ironsides, Rolf Werner Juhle [de], vanished in the "Valley of Ten Thousand Smokes", Katmai National Monument, Alaska.