- John Sagutch
- G. Ralph Salt
- Elaine Sanderson
- Elfriede Schaaf
- LaVon Schaufert
- Pamela Joan Schindler
- Lester Schmidt
- Andrea Schmidtka
- Freeda Schow
- Paul Schultz
- Dennis Scott
- Thomas Scott-Many Grey Horses
- Benedict Scout
- Elizabeth "Delra" Scout
- Francis Scout
- Freda Scout
- Kristen Scout
- Kristian Scout
- Martin Scout
- Mildred "Millie" Scout
- Patricia Scout
- Rosetta Scout
- Sophie Scout
- Teresa Scout
- Terry Scout
- Timothy Scout
- Ronald Sears
- Leon Sellers
- Marie Service
- Austin Shade
- Carrie Shade
- Chance Shade
- Chelsie Shade
- Darby Shade
- Ervin Shade
- Justin Shade
- Marilyn Shade
- Tyson Shade
- Charmayne Shade-Henry
- Heidelore Klietz Sharp
- Afton Shaw
- Donald Shaw
- Barbara Sheen
- Norman Sheen
- Daniel Shewchuk
- June Bowlby Shideler
- Al Shields
- Connie Pitcher-Shields
- Grant Shields
- Christine Shingoose
- Arla Shipley
- Kevin Shipley
- Alfred Shot Both Sides
- Angie Shot Both Sides
- Christopher Jr. "Beans" Shot Both Sides
- Darryl Shot Both Sides
- Elvis Shot On Both Sides
- Kelsey Shot Both Sides/Hairy Bull
- Kenneth Shot Both Sides-Chief Moon
- Jonathon Shot Both Sides - Gros Ventre Boy
- Tristin Shot Both Sides
- Troy Shot Both SIdes
- Tyree Shot Both Sides
- Angie Shouting
- Bernard Shouting
- Charlie Shouting
- Daisy Shouting
- Geraldine Shouting
- Godfrey Shouting
- Kristy Shouting
- Lesley-Ann Shouting
- Marcel Shouting
- Marlon Shouting
- RENO TYLER SHOUTING
- Sterling Shouting
- Leslie Melvyn Siemens
- Shirley Sillito
- Verene Sillito
- Doreen Silvius
- Tyson Simon
- Adeline Singer
- Mary Singer
- William Singer IV
- Kari Skoien
- Virginia Sloan
- Brandon Small Eyes
- Deana Small Eyes
- Francis Small Eyes
- Frank Small Eyes
- Jessie Small Eyes
- Randy Small Eyes
- Rosie "Nicole" Small Eyes
- Norma Small Face
- Allen Smith
- Brian Smith
- Brittany Smith
- Byron Smith
- Cheryl Ann Smith
- Craig Smith
- Dianne Smith
- Edward Smith
- Ellen Smith
- Frank Smith
- Gary Smith
- Geraldine Smith
- Harry Smith
- James Smith
- Kelly Smith
- Smith, Lauren
- Linda Belle Smith
- Marjorie Smith
- Mary Smith
- Natasha Smith
- Orva Smith
- Randal Smith
- Roberta Smith
- Robert Solis
- Delecta Sommerfeldt
- Reita Sommerfeldt
- Rex Sommerfeldt
- Rhea Sommerfeldt
- Winslow Sommerfeldt
- Gracie Soop
- Louis Soop
- Kelly Soosay
- Marie Soosay
- Tamara Soosay
- Charly Angel Sorensen
- Clotilda Soup
- Clara Spackman
- Donna Spackman
- Neil Speaker
- Alma Spear Chief
- Dustin Spear Chief
- Isabell Spear Chief
- Melissa Spear Chief
- Miranda Spear Chief
- Vanessa Spearchief
- Winnifred Spear Chief
- Zan Renee Spear Chief
- Geoffrey Spencer
- Dorian Spotted Bull
- Michael Spotted Bull
- Skylar Spotted Bull
- Annie Stabbed Last
- Desiree Stabs Down
- Peyton Stabs Down-Iron Shirt
- Susan Stabs Down - Healy
- Dolores Standing Alone
- Doris Standing Alone
- Lorna Standing Alone
- Shae Standing Alone
- Patricia Stanford
- Arliene Stasiuk
- Constance Steed
- Breanna Steele
- Florence Stepan
- Authur Stephenson
- Alice Stevenson
- Earl Steves
- Betty Stewart
- Floyd Stewart
- David Still
- Reatha Stoddard
- Donna Stone
- Mona Stone
- Nora Stone-Campbell
- Bud Stout
- Erva Stout
- Andrew Strang
- Joan Strang
- Sarah Strate
- Valorie Stringham
- David Striped Wolf
- Evelyn Striped Wolf
- Marvin Striped Wolf
- Justin Stripped Squirrel
- Brian Strong
- Cathleen Sunderland
- Hugh Sutherland
- Mary Sweet Grass
- Jacob Sydor