| | 4608503220 | Bailey township | Lyman County | SD | Active government
providing primary
general-purpose functions A |
| | 4608505740 | Black Dog UT | Lyman County | SD | Statistical entity S |
| | 4608511154 | Central Lyman UT | Lyman County | SD | Statistical entity S |
| | 4608517845 | East Lyman UT | Lyman County | SD | Statistical entity S |
| | 4608531740 | Iona township | Lyman County | SD | Active government
providing primary
general-purpose functions A |
| | 4608533580 | Kennebec town | Lyman County | SD | Fictitious entity created
to fill the Census Bureau
geographic hierarchy F |
| | 4608539190 | Lower Brule UT | Lyman County | SD | Statistical entity S |
| | 4608546180 | Oacoma town | Lyman County | SD | Fictitious entity created
to fill the Census Bureau
geographic hierarchy F |
| | 4608546220 | Oacoma township | Lyman County | SD | Active government
providing primary
general-purpose functions A |
| | 4608551780 | Pratt township | Lyman County | SD | Active government
providing primary
general-purpose functions A |