| Index | Old Greenwich | Connecticut | National |
| Cost of living | 282 | 118 | 100 |
| Goods & Services | 113 | 109 | 100 |
| Groceries | 105 | 102 | 100 |
| Health care | 110 | 109 | 100 |
| Housing | 678 | 137 | 100 |
| Transportation | 102 | 100 | 100 |
| Utilities | 131 | 130 | 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 | $250,001 | $20,833 | $5,833 | $7,501 |
| Renters | $157,009 | $13,084 | $3,663 | $4,711 |
| State | General Sales Tax | With Max Surtax |
| Connecticut | 6.35% | 6.35% |
| State | Income Tax (Low) | Income Tax (High) |
| Connecticut | 3% | 6.99% |
| Item | Old Greenwich | National avg. | Difference |
| Haircut | $32.33 | $24.26 | 33.3% |
| Beauty Salon | $48.56 | $45.56 | 6.6% |
| Toothpaste | $3.66 | $3.70 | 1.1% |
| Shampoo | $1.50 | $1.28 | 17.4% |
| Movie | $13.76 | $12.13 | 13.4% |
| Bowling | $19.63 | $18.00 | 9.0% |
| Item | Old Greenwich | National avg. | Difference |
| Ground Beef | $6.34 | $5.84 | 8.6% |
| Fried Chicken | $1.61 | $1.57 | 2.4% |
| Milk | $4.73 | $4.67 | 1.2% |
| Potatoes | $5.03 | $4.93 | 1.9% |
| Pizza | $10.07 | $12.09 | 16.7% |
| Beer | $10.62 | $10.41 | 2.0% |
| Item | Old Greenwich | National avg. | Difference |
| Optometrist | $140.10 | $125.68 | 11.5% |
| Doctor | $143.23 | $135.78 | 5.5% |
| Dentist | $123.00 | $113.29 | 8.6% |
| Ibuprofen | $11.00 | $10.65 | 3.3% |
| Lipitor | $401.34 | $468.60 | 14.4% |
| Item | Old Greenwich | National avg. | Difference |
| Home Price | $1,615,300.00 | $184,700.00 | 774.6% |
| Avg. Mortgage Payment | $1,857.27 | $2,346.69 | 20.9% |
| Apartment Rent | $2,089.00 | $949.00 | 120.1% |
| Item | Old Greenwich | National avg. | Difference |
| Gasoline | $3.33 | $3.46 | 3.7% |
| Tire Balancing | $57.68 | $59.92 | 3.7% |
| Item | Old Greenwich | National avg. | Difference |
| All Electricity | $281.67 | $193.99 | 45.2% |
| Phone | $185.16 | $192.25 | 3.7% |
| City | Population | Cost of Living Index | National Avg. |
| Cannondale, CT | 440 | 112 | 12.4% |
| Greenville CDP (Greene County), NY | 604 | 106 | 6.1% |
| Hartsdale, NY | 3,205 | 133 | 32.7% |
| Mount Vernon, NY | 67,623 | 137 | 37.4% |
| Mount Kisco, NY | 10,949 | 141 | 40.7% |
| Old Greenwich, CT | 6,980 | 282 | 182.1% |
| City | Population | Cost of Living Index | National Avg. |
| King, NC | 6,980 | 96 | 4.0% |
| Great Neck Plaza, NY | 6,980 | 145 | 44.9% |
| Oak Ridge, NC | 6,979 | 134 | 34.4% |
| Clinton, IL | 6,982 | 77 | 23.0% |
| Benton, IL | 6,977 | 85 | 15.0% |
| Old Greenwich, CT | 6,980 | 282 | 182.1% |