| ST. ALOYSIUS CATHOLIC CEMETERY ASSOCIATION | — | NS008580 | 1987-07-29 | Active | Sturgis |
| ST. ALOYSIUS CHURCH, ARDMORE, SD 57715 | — | CH003092 | 1981-06-02 | Dissolved | — |
| ST. AMBROSE ROMAN CATHOLIC CHURCH OF DEADWOOD, SOUTH DAKOTA | — | CH002750 | 1890-11-12 | Active | Rapid City |
| ST. ANDREW'S EPISCOPAL CHURCH, INC. | — | CH002960 | 1975-09-24 | Active | RAPID CITY |
| ST. ANDREWS CEMETERY ASSOCIATION | — | NS002055 | 1898-12-28 | Active | Oldham |
| St. Andrews Enterprises, Inc. | — | DB143087 | 2018-01-25 | Dissolved | Dakota Dunes |
| ST. ANDREWS TELECOMMUNICATIONS, INC. | — | FB025053 | 2001-04-18 | Revoked | LAS VEGAS |
| ST. ANN'S CORPORATION | — | NS005407 | 1973-09-19 | Dissolved | Watertown |
| ST. ANNE BUILDING ASSOCIATION, LLP | — | DR000344 | 1999-01-22 | Inactive | — |
| St. Anne Street Series of St. Hill Properties, LLC | — | DL250513 | 2023-05-10 | Active | SPEARFISH |
| St. Anne's Properties, LLC | — | DL201612 | 2021-04-24 | Dissolved | Sioux Falls |
| St. Anne, LLC | — | DL305791 | 2025-07-29 | Active | Watertown |
| ST. ANSGAR EVANGELICAL LUTHERAN CHURCH OF PORTLAND | — | 19540000N | 1954-09-15 | Active | — |
| ST. ANTHONY CATHOLIC CHURCH OF PUKWANA | — | CH003302 | 1991-01-25 | Inactive | PUKWANA |
| ST. ANTHONY PARISH OF HECLA | — | CH003238 | 1988-04-12 | Dissolved | — |
| ST. ANTHONY'S CHURCH FOUNDATON, INC. | — | NS007672 | 1983-11-04 | Active | HOVEN |
| ST. ANTHONY'S CHURCH OF HECLA | — | CH000606 | 1918-05-23 | Inactive | HECLA |
| ST. Anthony's Hoven Foundation, Inc. | — | NS129539 | 2017-01-09 | Active | HOVEN |
| ST. BARTH DREAM LLC | — | DL025105 | 2011-07-05 | Active | Alpine |
| ST. BENEDICT HEALTH CENTER | — | NS001042 | 1966-08-31 | Active | PARKSTON |
| ST. BENEDICT HEALTH CENTER FOUNDATION | — | NS011272 | 1999-05-21 | Dissolved | PARKSTON |
| ST. BERNARD'S PROVIDENCE HOSPITAL, INCORPORATED | — | NS001081 | 1966-11-21 | Inactive | MILBANK |
| ST. BONIFACE CATHOLIC CEMETERY IDYLWILDE, INC. | — | NS013155 | 2006-06-12 | Active | FREEMAN |
| ST. BRANDAAN FINANCIAL, INC. | — | FB022863 | 1999-08-16 | Revoked | DES MOINES |
| St. Bridget Catholic Church of Rosebud, South Dakota | — | NS129208 | 2016-11-10 | Dissolved | ROSEBUD |
| St. Catherine Catholic Church of Promise, South Dakota | — | NS129214 | 2016-11-10 | Dissolved | Eagle Butte |
| ST. CATHERINE UNIVERSITY | — | FN011383 | 2013-04-24 | Active | SAINT PAUL |
| ST. CATHERINE'S CATHOLIC CHURCH OF OLDHAM | — | CH003234 | 1988-03-14 | Dissolved | OLDHAM |
| St. Charles Borromeo Catholic Church of St. Francis, South Dakota | — | NS129209 | 2016-11-10 | Dissolved | Saint Francis |
| ST. CHARLES PARTNERS LLC | — | DL005459 | 2003-01-17 | Inactive | SIOUX FALLS |
| ST. CHARLES RESTAURANT, L.L.C. | — | DL011383 | 2006-05-19 | Inactive | PIERRE |
| ST. CHARLES SUPER 8 MOTEL, INC. | — | DB026701 | 1987-09-14 | Dissolved | — |
| ST. CLAIR INDUSTRIES, INC. | — | FB007906 | 1981-09-03 | Inactive | FT. LAUDERDALE |
| ST. CLAIR INVESTMENTS LIMITED PARTNERSHIP | — | DP002237 | 2011-08-18 | Active | TULARE |
| ST. CLAIR MANAGEMENT, LLC | — | DL025439 | 2011-08-16 | Active | TULARE |
| ST. CLAIR RANCH, A LIMITED PARTNERSHIP | — | DP000844 | 1998-04-03 | Active | TULARE |
| ST. CLAIRSVILLE SUPER 8 MOTEL, INC. | — | DB023882 | 1984-10-26 | Dissolved | — |
| ST. CLOUD ACOUSTICS, INC. | — | FB035820 | 2012-03-12 | Revoked | ST JOSEPH |
| ST. CLOUD DOWNTOWN HOTEL, LLC | — | DL027474 | 2012-03-08 | Active | Aberdeen |
| ST. CLOUD LODGING ASSOCIATES, LLC | — | DL014050 | 2007-06-07 | Active | ABERDEEN |
| ST. CLOUD LODGING GROUP, LLC | — | DL011131 | 2006-04-14 | Active | Aberdeen |
| ST. CLOUD REFRIGERATION COMPANY | — | FB016159 | 1993-06-28 | Revoked | ST CLOUD |
| St. Cloud Refrigeration, Inc. | — | FB265961 | 2024-01-08 | Active | ST. CLOUD |
| ST. CLOUD RESTAURANT SUPPLY COMPANY | — | FB017797 | 1995-04-10 | Revoked | ST CLOUD |
| St. Cloud Restoration, LLC | — | FL261336 | 2023-10-24 | Active | Waite Park |
| ST. COLUMBA CATHOLIC CHURCH OF MAYFIELD | — | CH003232 | 1988-02-29 | Inactive | IRENE |
| ST. COLUMBA'S CEMETERY ASSOCIATION | — | NS005386 | 1973-08-10 | Active | Irene |
| ST. COLUMBKILL'S NORTH CEMETERY ASSOCIATION | — | NS005067 | 1972-03-09 | Active | — |
| ST. CROIX CLUB, INC. | — | 19450032ND | 1945-11-05 | Active | — |
| ST. CROIX COUNTRY CLUB, INC. | — | 19340026D | 1934-05-15 | Suspended | — |
| ST. CROIX HISTORICAL SOCIETY | — | 19540001ND | 1954-06-16 | Active | — |
| St. Croix Hospice, LLC | — | FL199339 | 2021-03-24 | Active | Oakdale |
| ST. CROIX JAYCEES | — | 19650046ND | 1965-08-09 | Suspended | — |
| ST. CROIX LIQUIDATING CO. | — | 19270028ND | 1927-05-09 | Dissolved | — |
| ST. CROIX MASONIC ASSOCIATION | — | 19180001ND | 1918-03-23 | Suspended | — |
| St. Croix Publishing LLC | — | DL041117 | 2014-11-17 | Dissolved | HOPKINS |
| St. Croix River Resort, LLC | — | DL040275 | 2014-09-10 | Inactive | RAPID CITY |
| St. Croix Surveying, LLC | — | DL172467 | 2019-11-01 | Active | Watertown |
| ST. CROIX VALLEY CHAMBER OF COMMERCE | — | 19480021ND | 1948-04-12 | Active | — |
| ST. CROIX VALLEY INSURANCE SERVICE, INC. | — | FB025221 | 2001-06-11 | Revoked | HUDSON |
| ST. CROIX VALLEY SERVICES, INC. | — | DB057365 | 2012-12-17 | Dissolved | SOMERSET |
| ST. CROIX WATER POWER COMPANY | — | 19030009D | 1903-02-20 | Active | — |
| ST. DEMETRIOS HELLENIC ORTHODOX CEMETERY ASSOCIATION | — | 19570010N | 1957-06-27 | Active | — |
| ST. DENNIS INSPECTION, LLC | — | DL017525 | 2008-10-14 | Dissolved | BECKER |
| ST. DOM'S ALUMNI EDUCATIONAL ASSOCIATION, INC. | — | 19630001ND | 1963-03-25 | Suspended | — |
| ST. DYSMAS OF SOUTH DAKOTA | — | NS009939 | 1993-09-27 | Active | SIOUX FALLS |
| ST. EDWARD'S CATHOLIC CHURCH OF WORTHING, SOUTH DAKOTA | — | CH001754 | 1919-11-17 | Inactive | WORTHING |
| St. Elizabeth Services LLC | — | DL236431 | 2022-12-31 | Inactive | Goodwin |
| St. Eustace Lodge and Family Retreat LLC | — | DL268590 | 2024-02-15 | Active | Lowry |
| St. Faber Group, LLC | — | DL128233 | 2016-12-01 | Dissolved | Spearfish |
| ST. FRANCIS CHAMBER OF COMMERCE | — | 19650018ND | 1965-03-08 | Active | — |
| ST. FRANCIS DAY CARE CENTER, INCORPORATED | — | NS006939 | 1980-05-23 | Inactive | — |
| St. Francis Dental Clinic, LLC | — | DL035342 | 2013-10-04 | Dissolved | rosebud |
| ST. FRANCIS ENERGY COMPANY, INC. | — | DB043352 | 2000-10-26 | Dissolved | ST FRANCIS |
| ST. FRANCIS HOME CORPORATION | — | NS007796 | 1984-03-19 | Dissolved | — |
| ST. FRANCIS HOUSE OF SIOUX FALLS | — | NS012293 | 2003-05-05 | Active | SIOUX FALLS |
| ST. FRANCIS MISSION | — | NS004277 | 1911-05-03 | Active | ST FRANCIS |
| ST. FRANCIS MISSION DENTAL CLINIC | — | NS014417 | 2010-09-21 | Dissolved | ST FRANCIS |
| ST. FRANCIS MISSION FOUNDATION | — | NS013794 | 2008-08-04 | Inactive | Rapid City |
| ST. FRANCIS OF ASSISI CHURCH | — | CH002773 | 1901-05-21 | Active | STURGIS |
| ST. FRANCIS SENIOR CITIZENS, INC. | — | NS007947 | 1984-09-28 | Dissolved | — |
| ST. FRANCIS SNO ANGELS | — | 19680010ND | 1968-08-22 | Dissolved | — |
| ST. FRANCIS XAVIER., OF PONCA CREEK | — | CH001919 | 1922-04-25 | Active | Gregory |
| ST. GENESIUS PRESS, LTD. | — | DB021287 | 1982-02-03 | Inactive | — |
| ST. GEORGE GRANGE(INC.), NO.421, PATRONS OF HUSBANDRY | — | 19070002ND | 1907-01-21 | Active | — |
| St. George Holdings, LLC | — | DL130947 | 2017-02-23 | Dissolved | NEW YORK |
| St. George Retirement, L.L.C. | — | DL150590 | 2018-07-02 | Active | Aberdeen |
| ST. GEORGE'S EPISCOPAL CHURCH | — | 19160005ND | 1916-03-13 | Merged | — |
| ST. GERMAIN IRRIGATING COMPANY | — | DB005878 | 1890-09-06 | Active | CAPUTA |
| ST. GOLIARD INVESTMENT COMPANY, INC. | — | DB258165 | 2023-09-06 | Active | Hill City |
| ST. GOLIARD INVESTMENT COMPANY, INC. | — | DB019058 | 1979-09-19 | Dissolved | HILL CITY |
| ST. HELENS INVESTMENTS, INC. | — | FB020972 | 1998-02-05 | Inactive | MERCER ISLAND |
| ST. HENRY CEMETERY, INC. | — | NS008071 | 1985-04-01 | Active | HENRY |
| ST. HILAIRE SEED COMPANY, INC. | — | FB037515 | 2014-02-10 | Inactive | ST HILAIRE |
| St. Hill Properties, LLC | — | DL248728 | 2023-04-14 | Active | Spearfish |
| ST. HUBERT HUNTING CLUB L.L.P. | — | DR001150 | 2007-10-12 | Revoked | — |
| St. Jacob's | — | CH261698 | 2023-11-01 | Active | Lead |
| ST. JACOBI EVANGELICAL LUTHERAN CHURCH OF GLENHAM, SOUTH DAKOTA | — | CH002573 | 1920-05-27 | Dissolved | Glenham |
| ST. JAMES APTS., L.L.C. | — | DL005175 | 2002-10-25 | Active | HOT SPRINGS VILLAGE |
| ST. James Capital Group, LLC | — | DL047289 | 2016-02-26 | Active | CLARK |
| ST. JAMES CHURCH, BELLE FOURCHE, SOUTH DAKOTA | — | CH000095 | 1959-09-29 | Active | BELLE FOURCHE |
| ST. JAMES CONGREGATIONAL CHURCH OF ROSCOE, SOUTH DAKOTA | — | CH001149 | 1930-01-13 | Dissolved | ROSCOE |
| ST. JAMES EV. LUTHERAN CHURCH OF TOLSTOY | — | CH002233 | 1924-07-18 | Inactive | — |
| St. James Lutheran Church | — | CH002763 | 1950-03-23 | Active | LEOLA |
| ST. JAMES LUTHERAN CONGREGATION | — | CH000011 | 1929-09-14 | Active | Belle Fourche |
| ST. JAMES MOTOR COMPANY | — | DB035308 | 1995-01-19 | Inactive | — |
| ST. JAMES PLACE, LLC | — | DL015783 | 2008-02-14 | Dissolved | BELLE FOURCHE |
| ST. JOE AMERICAN CORPORATION | — | FB006255 | 1978-05-19 | Inactive | CLAYTON |
| ST. JOE INVESTMENT GROUP, L.L.C. | — | DL018436 | 2009-03-09 | Inactive | SIOUX FALLS |
| St. Joe Lofts, LLC | — | DL049867 | 2016-09-08 | Active | RAPID CITY |
| ST. JOE PROPERTIES, L.L.C. | — | DL045967 | 2015-11-30 | Active | Black Hawk |
| St. Joe's Association, LLC | — | DL215268 | 2021-11-29 | Active | Yankton |
| ST. JOHN AMERICAN LUTHERAN CHURCH OF SIOUX FALLS | — | CH002107 | 1942-09-22 | Active | Sioux Falls |
| ST. JOHN BILINGUAL BAPTISTE CHURCH | — | 19300001N | 1930-02-19 | Active | — |
| ST. JOHN CATHOLIC CEMETERY, BERESFORD, SOUTH DAKOTA, UNION COUNTY, INC. | — | NS010973 | 1998-02-11 | Active | BERESFORD |
| ST. JOHN CATHOLIC CHURCH OF VEBLEN | — | CH003312 | 1991-02-27 | Inactive | VEBLEN |
| ST. JOHN EV. LUTHERAN CHURCH OF THE SYNOD OF MO., OHIO & OTHER STATES | — | CH001940 | 1919-11-03 | Active | NORRIS |
| ST. JOHN FINANCIAL CORPORATION | — | FB018449 | 1995-11-30 | Inactive | DES MOINES |
| ST. JOHN LUTHERAN CHURCH (DIMOCK) | — | CH003061 | 1980-04-22 | Active | DIMOCK |
| ST. JOHN LUTHERAN CHURCH (WARNER) | — | CH000668 | 1940-12-23 | Active | WARNER |
| ST. JOHN LUTHERAN CHURCH OF MADISON, SOUTH DAKOTA | — | CH003154 | 1938-01-31 | Active | MADISON |
| ST. JOHN LUTHERAN CHURCH OF SELBY | — | CH000168 | 1915-07-14 | Active | SELBY |
| ST. JOHN NEUMANN CATHOLIC PARISH OF FARMER-SPENCER | — | CH001433 | 1905-11-21 | Inactive | FARMER |
| ST. JOHN REGIONAL MEDICAL CENTER, INC. | — | NS001618 | 1944-10-19 | Dissolved | — |
| St. John the Baptist Church of Custer | — | CH000964 | 1901-12-22 | Active | CUSTER |
| ST. JOHN THE BAPTIST HUNGARIAN RUSSIAN GREEK CATHOLIC CHURCH | — | 19150002N | 1915-02-04 | Active | — |
| ST. JOHN VALLEY ASSOCIATES, INC. | — | 19600048ND | 1960-10-28 | Active | — |
| ST. JOHN WELDING, INC. | — | DB022925 | 1983-12-06 | Inactive | — |
| ST. JOHN'S BAPTIST CHURCH OF SIOUX FALLS, SOUTH DAKOTA | — | CH002070 | 1920-02-21 | Inactive | — |
| ST. JOHN'S CATHOLIC CHURCH OF CONDE, S.D. | — | CH002329 | 1912-01-12 | Dissolved | CONDE |
| ST. JOHN'S CEMETARY ASSOCIATION | — | NS006048 | 1976-07-14 | Active | BERESFORD |
| St. John's Cemetery Association | — | NS188466 | 2020-09-28 | Active | HOWARD |
| ST. JOHN'S ENGLISH EVANGELICAL LUTHERAN CONGREGATION OF HECLA | — | CH000618 | 1918-01-12 | Active | Hecla |
| ST. JOHN'S EVANGELICAL LUTHERAN CHURCH (CORSICA) | — | CH000393 | 1967-06-27 | Dissolved | — |
| ST. JOHN'S EVANGELICAL LUTHERAN CHURCH (EMERY) | — | CH000372 | 1966-10-10 | Inactive | — |
| St. John's Evangelical Lutheran Church of Aberdeen, South Dakota | — | CH180534 | 2020-04-27 | Active | Aberdeen |
| ST. JOHN'S EVANGELICAL LUTHERAN CHURCH OF BRITTON, SOUTH DAKOTA | — | CH001895 | 1892-11-05 | Active | Britton |
| ST. JOHN'S EVANGELICAL LUTHERAN CHURCH OF HERRICK | — | CH001328 | 1931-01-07 | Inactive | — |
| ST. JOHN'S EVANGELICAL LUTHERAN CHURCH OF WAGNER | — | CH000774 | 1944-01-10 | Active | WAGNER |
| ST. JOHN'S EVANGELICAL LUTHERAN CHURCH OF WITTEN | — | CH002442 | 1925-08-10 | Dissolved | WITTEN |
| ST. JOHN'S EVANGELICAL LUTHERAN CHURCH UAC | — | CH001143 | 1930-10-08 | Active | BOWDLE |
| ST. JOHN'S EVANGELICAL LUTHERAN CHURCH, MISSOURI SYNOD OF TYNDALL | — | CH000513 | 1950-08-16 | Active | Tyndall |
| ST. JOHN'S EVANGELICAL LUTHERAN CHURCH, UAC, OF AGAR, SOUTH DAKOTA | — | CH003128 | 1983-02-09 | Dissolved | GETTYSBURG |
| ST. JOHN'S EVANGELICAL LUTHERAN CONGREGATION OF CHESTER, LAKE COUNTY, SOUTH DAKOTA | — | CH001682 | 1948-04-22 | Inactive | — |
| ST. JOHN'S LUTHERAN CHURCH (WEBSTER) | — | CH000211 | 1903-03-25 | Active | WEBSTER |
| ST. JOHN'S LUTHERAN CHURCH OF GREGORY | — | CH001304 | 1907-09-28 | Active | GREGORY |
| ST. JOHN'S LUTHERAN CHURCH OF HOSMER, S.D. | — | CH001148 | 1932-01-13 | Active | HOSMER |
| ST. JOHN'S LUTHERAN CHURCH OF MONTROSE SOUTH DAKOTA | — | CH001838 | 1939-09-19 | Active | MONTROSE |
| ST. JOHN'S LUTHERAN CHURCH OF REVILLO, S. DAK. | — | CH001244 | 1911-10-06 | Active | REVILLO |
| ST. JOHN'S LUTHERAN CHURCH OF SMITHWICK, SOUTH DAKOTA | — | CH000189 | 1956-07-28 | Active | HOT SPRINGS |
| ST. JOHN'S LUTHERAN CHURCH, BRADLEY, SOUTH DAKOTA | — | CH003067 | 1980-07-22 | Dissolved | Bradley |
| ST. JOHN'S LUTHERAN CHURCH, U.A.C. OF HOWARD, SOUTH DAKOTA | — | CH000277 | 1887-04-23 | Active | Howard |
| St. John's Rauville Cemetery Association | — | NS307193 | 2025-08-17 | Active | Watertown |
| ST. JOHN'S ROMAN CATHOLIC CHURCH OF HARROLD, SOUTH DAKOTA | — | CH001479 | 1929-04-22 | Inactive | HARROLD |
| ST. JOHN'S UNITED CHURCH OF CHRIST, LAKE TOWNSHIP, SPINK COUNTY, SOUTH DAKOTA | — | CH000116 | 1960-01-13 | Dissolved | — |
| St. Johns Cemetery Association Rauville Township, Inc. | — | NS049228 | 2014-02-13 | Dissolved | — |
| ST. JOHNS EVANGELICAL LUTHERAN CONGREGATION OF CONCORD DAKOTA | — | CH001664 | 1886-12-07 | Active | RAMONA |
| St. Joseph Academy | — | NS266594 | 2024-01-17 | Active | SIOUX FALLS |
| St. Joseph Bookkeeping LLC | — | DL183346 | 2020-06-19 | Active | Rapid City |
| ST. JOSEPH CATHOLIC CHURCH OF DOLAND, SOUTH DAKOTA | — | CH003007 | 1909-11-09 | Active | DOLAND |
| ST. JOSEPH CATHOLIC CHURCH OF LAKE CITY | — | CH003304 | 1991-01-25 | Inactive | LAKE CITY |
| ST. JOSEPH CATHOLIC CHURCH OF WAVERLY | — | CH003315 | 1991-02-27 | Inactive | WAVERLY |
| ST. JOSEPH CATHOLIC HOUSING - HERITAGE, INC. | — | NS010577 | 1996-05-21 | Dissolved | — |
| ST. JOSEPH CATHOLIC HOUSING - ROLLING HILLS, INC. | — | NS010576 | 1996-05-21 | Dissolved | — |
| ST. JOSEPH CATHOLIC HOUSING, INC. | — | NS010413 | 1995-10-12 | Active | SIOUX FALLS |
| ST. JOSEPH CATHOLIC SCHOOL OF MOBRIDGE | — | NS010648 | 1996-09-18 | Active | MOBRIDGE |
| ST. JOSEPH CEMETERY OF TURTON, INC. | — | NS009107 | 1990-02-15 | Active | TURTON |
| ST. JOSEPH HOSPITAL | — | 19600018ND | 1960-02-28 | Active | — |
| ST. JOSEPH PROPERTY, LLC | — | DL244302 | 2023-02-13 | Active | RAPID CITY |
| ST. JOSEPH SUPER 8 MOTEL, INC. | — | DB024171 | 1985-02-07 | Dissolved | — |
| St. Joseph the Worker Montessori, LLC | — | DL200974 | 2021-04-15 | Dissolved | Sioux Falls |
| ST. JOSEPH'S APOSTOLATE FOR CHRISTIAN CULTURE, INC. | — | NS010968 | 1998-02-03 | Inactive | — |
| ST. JOSEPH'S CATHOLIC CHURCH (WAUBAY) | — | CH003035 | 1979-08-10 | Inactive | — |
| ST. JOSEPH'S CHURCH (BERESFORD) | — | CH002526 | 1943-11-04 | Inactive | — |
| ST. JOSEPH'S CHURCH EDEN, SOUTH DAKOTA | — | CH001054 | 1906-02-12 | Dissolved | — |
| ST. JOSEPH'S CONVENT AND HOSPITAL | — | 19130021ND | 1913-03-12 | Active | — |
| St. Joseph's Farm LLC | — | DL300524 | 2025-05-18 | Active | Rapid City |
| ST. JOSEPH'S HOSPITAL | — | NS000149 | 1959-05-01 | Inactive | — |
| St. Joseph's Precision Precast Erectors LLC | — | DL309858 | 2025-09-22 | Active | Post Falls |
| ST. JOSEPH'S ROMAN CATHOLIC CHURCH OF LILY | — | CH001049 | 1905-07-27 | Active | SIOUX FALLS |
| ST. JOSEPH'S ROMAN CATHOLIC CHURCH, WESSINGTON, SOUTH DAKOTA | — | CH000457 | 1923-07-10 | Inactive | WESSINGTON |
| ST. JOSEPHINE BAKHITA CATHOLIC PARISH | — | CH003515 | 2004-05-03 | Active | SIOUX FALLS |
| St. Josephine Bakhita Kunama Catholic Community of the Eparchy of Barentu in Sioux Falls, SD. Company | — | NS296266 | 2025-03-24 | Dissolved | Sioux Falls |
| St. Julian, LLC | — | DL259842 | 2023-09-29 | Active | Watertown |
| ST. LANDRY LAND & LUMBER COMPANY | — | DB003081 | 1909-01-18 | Dissolved | — |
| ST. LAWRENCE CONGREGATIONAL CHURCH OF PORTLAND, MAINE | — | 19160000L | 1916-05-18 | Active | — |
| ST. LAWRENCE FARMERS ELEVATOR ASSOCIATION | — | CO000070 | 1926-11-22 | Inactive | — |
| ST. LAWRENCE GRAIN STORAGE, LTD., A LIMITED PARTNERSHIP | — | DP001514 | 2004-02-20 | Inactive | — |
| ST. LAWRENCE WRIGHT MEMORIAL CONGREGATIONAL CHURCH INC. | — | 19580008N | 1958-07-21 | Active | — |
| ST. LAWRENCE, SD | — | CI000111 | 1886-06-05 | Active | — |
| ST. LOUIS (BRIDGETON) SUPER 8 MOTEL, INC. | — | DB022906 | 1983-11-28 | Dissolved | — |
| ST. LOUIS ALUMNI ASSOCIATION INCORPORATED | — | 19460030ND | 1946-12-30 | Active | — |
| ST. LOUIS LEASING CORPORATION | — | FB013919 | 1990-10-31 | Revoked | ELLISVILLE |
| ST. LUKE'S EVANG. LUTH. CHURCH OF LEMMON | — | CH002206 | 1909-10-27 | Active | Lemmon |
| ST. LUKE'S HEALTH RESOURCES | — | FN010398 | 1993-02-04 | Revoked | SIOUX CITY |
| ST. LUKE'S TRI-STATE HOSPITAL ASSOCIATION | — | FN010451 | 1994-12-27 | Inactive | BOWMAN |
| St. Margaret's Catholic Church of Lakeside, South Dakota | — | NS129206 | 2016-11-10 | Active | OWANKA |
| ST. MARK'S CHURCH OF ABERDEEN | — | CH000399 | 1901-09-12 | Active | ABERDEEN |
| ST. MARK'S HOME FOR WOMEN | — | 18710001ND | 1871-02-03 | Dissolved | — |
| ST. MARK'S LUTHERAN CHURCH OF SIOUX FALLS | — | CH002031 | 1955-03-05 | Active | Sioux Falls |