SHIELD: Per pale, Azure and Gules two peace pipes in saltire Or debruised by a pale Argent bearing a Sioux chief Proper.
CREST: From a wreath of the colors Or and Azure, a plate surmounted by a compass rose of the first detailed Vert, issuant from its base and on either side a flowing ribbon of the second bearing a bar Argent, all between an arch of six mullets, three and three, Gules.
SUPPORTERS: Centered behind the shield is a depiction of the Sergeant Floyd Monument Proper.
MOTTO: A scroll Vert doubled and inscribed “FORGING A NEW FRONTIER”
SHIELD: The shield colors are those of the Iowa state flag. The three sections denote the Sioux City Tri-State Metropolitan Area, or “Siouxland,” as it is known locally. The Sioux chief depicted symbolizes the rich history of Sioux City and is similar to images displayed on the Badgerow Building in downtown Sioux City. War Eagle, the most celebrated chief of Sioux City, was presented a peace medal by President Martin Van Buren. The peace medal became War Eagle’s most prized possession and displayed a tomahawk crossed with a peace pipe, signifying War Eagle’s brave leadership and his love of peace.
CREST: The six stars denote LCS 11 as the sixth Freedom Variant ship of its class. The stars are colored red to symbolize the courage of the Sailors that crew USS SIOUX CITY. The compass rose represents the Lewis and Clark expedition and is colored green to symbolize the territory covered in the area now known as Sioux City. The flowing blue and white ribbon denotes Sioux City as the navigational head of the Missouri River.
SUPPORTERS: The Sergeant Floyd Monument, the United Sates first designated National Historic Landmark, is located on Floyd’s Bluff overlooking the Missouri River in Sioux City, and honors U.S. Army Sergeant Charles Floyd. Sergeant Floyd was the only man to perish on the Lewis and Clark Expedition and was buried near the monument’s location on August 20, 1804.
SEAL: The coat of arms as blazoned in full color on an oval field within a dark blue designation band, edged with a gold roped border and bearing the name “USS SIOUX CITY” at the top and “LCS 11” at the base.