| Index | Castlewood | South Dakota | National |
| Cost of living | 86 | 89 | 100 |
| Goods & Services | 91 | 94 | 100 |
| Groceries | 97 | 97 | 100 |
| Health care | 103 | 98 | 100 |
| Housing | 74 | 77 | 100 |
| Transportation | 91 | 97 | 100 |
| Utilities | 84 | 88 | 100 |


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| Cost of living index | |
| Goods & Services index | |
| Groceries index | |
| Health care index | |
| Housing index | |
| Transportation index | |
| Utilities index |
| Median Income | Per Year | Per Month | Max Budget (28% DTI) | Max Budget (36% DTI) |
| Owners | $65,833 | $5,486 | $1,536 | $1,975 |
| Renters | $31,563 | $2,630 | $736 | $947 |
| State | General Sales Tax | With Max Surtax |
| South Dakota | 4.5% | 6% |
| State | Income Tax (Low) | Income Tax (High) |
| South Dakota | 0% | 0% |
| Item | Castlewood | National avg. | Difference |
| Haircut | $24.32 | $24.26 | 0.2% |
| Beauty Salon | $35.22 | $45.56 | 22.7% |
| Toothpaste | $3.80 | $3.70 | 2.7% |
| Shampoo | $1.29 | $1.28 | 0.7% |
| Movie | $9.36 | $12.13 | 22.9% |
| Bowling | $16.40 | $18.00 | 8.9% |
| Item | Castlewood | National avg. | Difference |
| Ground Beef | $5.89 | $5.84 | 0.8% |
| Fried Chicken | $1.41 | $1.57 | 10.4% |
| Milk | $4.75 | $4.67 | 1.7% |
| Potatoes | $4.63 | $4.93 | 6.2% |
| Pizza | $10.64 | $12.09 | 12.0% |
| Beer | $9.33 | $10.41 | 10.4% |
| Item | Castlewood | National avg. | Difference |
| Optometrist | $135.10 | $125.68 | 7.5% |
| Doctor | $177.33 | $135.78 | 30.6% |
| Dentist | $108.21 | $113.29 | 4.5% |
| Ibuprofen | $10.48 | $10.65 | 1.7% |
| Lipitor | $357.08 | $468.60 | 23.8% |
| Item | Castlewood | National avg. | Difference |
| Home Price | $139,500.00 | $184,700.00 | 24.5% |
| Avg. Mortgage Payment | $2,133.89 | $2,346.69 | 9.1% |
| Apartment Rent | $670.00 | $949.00 | 29.4% |
| Item | Castlewood | National avg. | Difference |
| Gasoline | $3.28 | $3.46 | 5.3% |
| Tire Balancing | $49.42 | $59.92 | 17.5% |
| Item | Castlewood | National avg. | Difference |
| All Electricity | $141.67 | $193.99 | 27.0% |
| Phone | $194.04 | $192.25 | 0.9% |
| City | Population | Cost of Living Index | National Avg. |
| Goodwin, SD | 102 | 79 | 21.2% |
| Estelline, SD | 858 | 80 | 19.8% |
| Hayti, SD | 391 | 81 | 19.1% |
| Lake Norden, SD | 531 | 84 | 15.7% |
| Kranzburg, SD | 199 | 88 | 11.8% |
| Castlewood, SD | 582 | 86 | 13.6% |
| City | Population | Cost of Living Index | National Avg. |
| Sulphur Rock, AR | 582 | 83 | 16.6% |
| Laurel Hill, FL | 582 | 85 | 14.5% |
| Murrayville, IL | 582 | 81 | 18.8% |
| Tovey, IL | 582 | 77 | 22.5% |
| Bay Port, MI | 582 | 86 | 13.7% |
| Castlewood, SD | 582 | 86 | 13.6% |