| Index | Groton | Connecticut | National |
| Cost of living | 110 | 118 | 100 |
| Goods & Services | 108 | 109 | 100 |
| Groceries | 101 | 102 | 100 |
| Health care | 103 | 109 | 100 |
| Housing | 115 | 137 | 100 |
| Transportation | 96 | 100 | 100 |
| Utilities | 127 | 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 | $87,500 | $7,292 | $2,042 | $2,625 |
| Renters | $35,573 | $2,964 | $830 | $1,067 |
| State | General Sales Tax | With Max Surtax |
| Connecticut | 6.35% | 6.35% |
| State | Income Tax (Low) | Income Tax (High) |
| Connecticut | 3% | 6.99% |
| Item | Groton | National avg. | Difference |
| Haircut | $33.78 | $24.26 | 39.2% |
| Beauty Salon | $58.55 | $45.56 | 28.5% |
| Toothpaste | $3.65 | $3.70 | 1.5% |
| Shampoo | $1.42 | $1.28 | 10.9% |
| Movie | $12.85 | $12.13 | 5.9% |
| Bowling | $18.33 | $18.00 | 1.9% |
| Item | Groton | National avg. | Difference |
| Ground Beef | $6.23 | $5.84 | 6.7% |
| Fried Chicken | $1.46 | $1.57 | 7.4% |
| Milk | $4.73 | $4.67 | 1.2% |
| Potatoes | $4.96 | $4.93 | 0.6% |
| Pizza | $10.79 | $12.09 | 10.7% |
| Beer | $10.49 | $10.41 | 0.8% |
| Item | Groton | National avg. | Difference |
| Optometrist | $166.22 | $125.68 | 32.3% |
| Doctor | $182.50 | $135.78 | 34.4% |
| Dentist | $127.00 | $113.29 | 12.1% |
| Ibuprofen | $10.89 | $10.65 | 2.2% |
| Lipitor | $384.88 | $468.60 | 17.9% |
| Item | Groton | National avg. | Difference |
| Home Price | $223,300.00 | $184,700.00 | 20.9% |
| Avg. Mortgage Payment | $2,110.08 | $2,346.69 | 10.1% |
| Apartment Rent | $971.00 | $949.00 | 2.3% |
| Item | Groton | National avg. | Difference |
| Gasoline | $3.34 | $3.46 | 3.4% |
| Tire Balancing | $71.63 | $59.92 | 19.5% |
| Item | Groton | National avg. | Difference |
| All Electricity | $302.09 | $193.99 | 55.7% |
| Phone | $185.16 | $192.25 | 3.7% |
| City | Population | Cost of Living Index | National Avg. |
| Fishers Island, NY | 61 | 109 | 9.5% |
| Poquonock Bridge, CT | 1,640 | 105 | 5.3% |
| Oxoboxo River, CT | 2,772 | 106 | 5.8% |
| New London, CT | 27,001 | 106 | 6.1% |
| Waterford, CT | 2,922 | 110 | 10.3% |
| Groton, CT | 8,999 | 110 | 9.6% |
| City | Population | Cost of Living Index | National Avg. |
| Fairview, TX | 8,998 | 138 | 38.0% |
| Lock Haven, PA | 8,997 | 91 | 9.2% |
| Sheffield Lake, OH | 9,001 | 88 | 12.3% |
| Potsdam, NY | 9,003 | 96 | 4.0% |
| Roxborough Park, CO | 9,004 | 142 | 42.2% |
| Groton, CT | 8,999 | 110 | 9.6% |