Flag of South Dakota
South Dakota’s flag is the state seal inside a serrated gold sun on a sky-blue field, with SOUTH DAKOTA arched above and THE MOUNT RUSHMORE STATE below in gold. The sun goes back to the first flag of 1909: its maker, Ida Anding McNeil, said the state historian Doane Robinson suggested it for the state’s many days of sunshine.
How to read it
South Dakota Codified Laws § 1-6-4 (1939, amended 1963 and 1992) fixes a sky-blue field one and two-thirds as long as it is wide. The great seal, made as the constitution describes it, is centred and four-ninths of the flag’s width across, on a white background outlined in dark blue or on sky blue outlined in dark blue. Around it is a serrated gold sun five-ninths of the width across. “South Dakota” above and “The Mount Rushmore State” below follow the curve of the sun in gold letters one-eighteenth of the width high. Indoor and display flags have a gold fringe one-eighteenth of the width on the three sides away from the staff; outdoor flags need none. The present wording dates from 1992, when Representative Gordon Pederson’s measure replaced “The Sunshine State”, the Secretary of State says. The state has a pledge to its flag (§ 1-6-4.1).
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The seal piece by piece
Article XXI, section 1, of the state constitution describes the seal, the Secretary of State says: in the left foreground a smelting furnace and other mine works, in the left background a range of hills, in the right foreground a farmer at his plough, in the right background a herd of cattle and a field of corn, and between them a river with a steamboat. Across the top and bottom runs the motto “Under God the People Rule”, the state motto. The outer ring reads “State of South Dakota” and “Great Seal” with the year of admission; the 1885 wording “State of Dakota” was changed in 1889.
Three flags, all still legal
The flag of 1909, designed by Ida Anding, a legislative librarian, had a gold sun with “South Dakota” and “The Sunshine State” on one side and the seal in dark blue on the other. A two-sided flag was hard and costly to make; McNeil later said that had she known more about flags she would have left the back plain. House Bill 503 of 1963 put the seal inside the sun on a single side, and the 1992 law changed the words. Both changes kept earlier flags official, and the code still says that every flag made under state law before 1 July 1992 remains an official state flag, so all three may be flown.
Who asked for the first flag
In 1909 State Senator Ernest May of Deadwood went to the state historian, Doane Robinson, about a flag. The Secretary of State’s page, quoting the Wiiyohi bulletin of 1948, says May came because the Deadwood pioneer Seth Bullock wanted one. The South Dakota Historical Society Foundation notes that Doane Robinson’s Encyclopedia of South Dakota does not mention Bullock, and that David A. Wolff, Bullock’s biographer, found no evidence he was involved.
Read next
- Next in US state flagsFlag of WisconsinWisconsin’s flag is the state coat of arms on royal blue, with WISCONSIN in white above and 1848, the year of statehood, below. The Wisconsin Blue Book explains the arms: a sailor and a miner for labour on water and land, a shield with a plough, a pick and shovel, an arm and hammer and an anchor for farming, mining, manufacturing and navigation, and a badger above with the motto “Forward”.
- The same shape in Coin gradesAG (about good)AG stands for about good: a very heavily worn coin that falls just short of good, with the rims worn into the lettering. It is a single grade on the 70-point Sheldon scale, AG 3.
More US state flags
The same shape elsewhere
Browse symbols drawn with circles, letters and numbers or squares and rectangles.
Sources
- South Dakota Codified Laws Chapter 1-6 (State Emblems), SDCL §§ 1-6-1, 1-6-2, 1-6-9, 1-6-10, 1-6-11, 1-6-16.5, South Dakota Legislature (Legislative Research Council), §§ 1-6-4, 1-6-4.1, 1-6-5
- State Seal and Symbols (South Dakota Secretary of State), South Dakota Secretary of State, "State Seal and Symbols," General Information: About the State of South Dakota, South Dakota Secretary of State, Great Seal of the State of South Dakota; State Flag and Pledge
- June 2013 - South Dakota's State Flag (South Dakota Historical Society Foundation), “June 2013 - South Dakota’s State Flag”, monthly history article, South Dakota Historical Society Foundation, South Dakota Historical Society Foundation, Article text
Researched, edited and approved by Rory Hansen before publishing. Last reviewed October 14, 2026. How we research
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