| BERESFORD ZION-UNITED METHODIST CHURCH | — | CH000180 | 1984-04-07 | Active | BERESFORD |
| BETHESDA LUTHERAN CHURCH OF MARION, SOUTH DAKOTA | — | CH000004 | 1913-05-01 | Active | MARION |
| BETHLEHEM EVANGELICAL LUTHERAN CHURCH OF WATERTOWN | — | CH000922 | 1957-01-05 | Dissolved | WATERTOWN |
| BETHLEHEM LUTHERAN CEMETERY ASS'N | — | NS007879 | 1984-06-13 | Active | WILLOW LAKE |
| BLACK HILLS ADVERTISING FEDERATION, INC. | — | NS007262 | 1981-10-05 | Active | Rapid City |
| BLACK HILLS AREA BIKERS, INC. | — | NS272280 | 2024-04-05 | Active | Rapid City |
| BLACK HILLS BIBLE CAMP, INC. | — | NS004974 | 1971-08-04 | Active | Spearfish |
| BLACK HILLS CENTER FOR EQUALITY INC. | — | NS013811 | 2008-08-27 | Active | RAPID CITY |
| BLACK HILLS COMMUNITY CHURCH, INC. | — | CH003367 | 1994-12-16 | Active | RAPID CITY |
| BLACK HILLS DANCE THEATRE, LTD. | — | NS006147 | 1976-12-30 | Active | Rapid City |
| BLACK HILLS POST NO. 5969 VETERANS OF FOREIGN WARS OF THE UNITED STATES | — | NS002323 | 1968-07-09 | Active | DEADWOOD |
| BLACK HILLS POW-WOW ASSOCIATION | — | NS008485 | 1987-03-13 | Active | RAPID CITY |
| BLACK HILLS ROD & GUN CLUB | — | NS002297 | 1937-03-10 | Dissolved | LEAD |
| BLACK HILLS SKI TEAM, INC. | — | NS014815 | 2012-04-12 | Active | Rapid city |
| BLACK HILLS SOCIETY FOR HUMAN RESOURCE MANAGEMENT | — | NS014981 | 2012-11-08 | Active | RAPID CITY |
| BLEGEN PUBLISHING, INC. | — | DB021144 | 1981-12-04 | Active | DE SMET |
| BLESSINGS FROM D-SKIES, INC. | — | FN213335 | 2021-10-29 | Revoked | Ball Ground |
| BON HOMME COUNTRY CLUB, INC. | — | NS001896 | 1968-02-20 | Active | TYNDALL |
| BON HOMME YOUTH WRESTLING, INC. | — | NS009815 | 1993-03-04 | Active | Tyndall |
| BOULDER CANYON COUNTRY CLUB | — | NS001065 | 1966-10-13 | Active | STURGIS |
| BOULDER CANYON SUBDIVISION HOMEOWNERS ASSOCIATION | — | NS010418 | 1995-10-13 | Active | STURGIS |
| BRAIN INJURY ALLIANCE OF SOUTH DAKOTA | — | NS011845 | 2001-09-11 | Active | SIOUX FALLS |
| BRANDON LUTHERAN CHURCH | — | CH001998 | 1932-01-04 | Active | BRANDON |
| BRANDON VALLEY BAND PARENTS, INC. | — | NS010660 | 1996-10-09 | Active | BRANDON |
| BRANDON VALLEY BASEBALL ASSOCIATION, INC. | — | NS014994 | 2012-11-26 | Active | BRANDON |
| BRANDON VALLEY FINE ARTS BOOSTERS | — | NS013021 | 2006-01-13 | Active | BRANDON |
| BRANDT COMMUNITY FIRE DEPARTMENT, INC. | — | NS007475 | 1982-11-17 | Active | BRANDT |
| BRATTVET-GREEN UNIT #66 AMERICAN LEGION AUXILIARY | — | NS011486 | 2000-04-24 | Active | LEMMON |
| BRENTFORD VOLUNTEER FIRE DEPARTMENT, INC. | — | NS011676 | 2001-01-25 | Active | BRENTFORD |
| BRITTON SOCCER ASSOCIATION, INC. | — | NS014955 | 2012-10-10 | Dissolved | BRITTON |
| BROOKINGS AREA HUMAN RESOURCE ASSOCIATION | — | NS013874 | 2008-11-07 | Dissolved | BROOKINGS |
| BROOKINGS EMPOWERMENT PROJECT | — | NS013601 | 2007-12-24 | Dissolved | BROOKINGS |
| BROOKINGS FARMERS' MARKET | — | NS014198 | 2009-12-28 | Dissolved | BROOKINGS |
| BROOKINGS SWIM CLUB, INC. | — | NS005438 | 1973-10-23 | Active | BROOKINGS |
| BRULE COUNTY HISTORICAL SOCIETY, INC. | — | NS007461 | 1982-10-15 | Active | KIMBALL |
| BRYANT PARKVIEW CARE CENTER, INC. | — | NS012185 | 2002-12-12 | Active | Bryant |
| BUFFALO GAP AREA COMMUNITY CENTER, INC. | — | NS013924 | 2009-01-16 | Dissolved | Buffalo Gap |
| BUFFALO GOSPEL TABERNACLE OF BUFFALO | — | CH001440 | 1934-04-25 | Dissolved | BUFFALO |
| BURKE MENS ASSOCIATION | — | NS010137 | 1994-07-15 | Active | BURKE |
| BURKE POST NO. 9950 VETERANS OF FOREIGN WARS OF THE UNITED STATES INCORPORATED | — | NS001353 | 1951-06-30 | Active | BURKE |
| Bad River Sportsman's Club, Inc. | — | NS323779 | 2026-03-19 | Active | PHILIP |
| Badlands Bad River Regional Economic Development Partnership | — | NS050042 | 2016-07-18 | Active | Wall |
| Baltic Fine Arts Boosters | — | NS281800 | 2024-08-27 | Active | Baltic |
| Barber Association of South Dakota | — | NS212739 | 2021-10-20 | Active | SIOUX FALLS |
| Bellator Titans | — | NS049960 | 2016-04-07 | Dissolved | Sioux Falls |
| Belle Fourche AA Group | — | NS212784 | 2021-10-21 | Dissolved | Belle Fourche |
| Belle Fourche Cannabis Corporation | — | DB210348 | 2021-09-16 | Dissolved | Belle Fourche |
| Belle Fourche and Tri-State Area News and Information Inc | — | NS258002 | 2023-09-04 | Dissolved | BELLE FOURCHE |
| Beresford Community Food Cupboard and Services | — | NS138736 | 2017-10-20 | Active | BERESFORD |
| Beresford Community Thanksgiving Fund, Inc. | — | NS288139 | 2024-12-03 | Active | Beresford |