Average Heating Bill in Maryland → St. Mary's County
$428/mo
$2,566/year
$1.28/sq ft (oil heat, 2,000 sq ft home)
| Fuel | Local Price | Cost/MMBTU | Annual Cost | Monthly (Heating) |
|---|---|---|---|---|
| Natural Gas Cheapest | $1.66/therm | $18 | $1,146 | $191 |
| Heat Pump | $0.36/kWh | $35 | $2,251 | $375 |
| Heating Oil | $4.70/gallon | $40 | $2,566 | $428 |
| Electric Baseboard | $0.36/kWh | $105 | $6,753 | $1,126 |
Cheapest option for this area
Natural Gas
$1,146/year estimated — saving $1,420/year vs heating oil
Average monthly heating costs during the October–March season for a 2,000 sq ft home in St. Mary's County:
Based on a 2,000 sq ft home with 85% oil furnace efficiency, COP 3.0 heat pump, NOAA 30-year normal heating degree days (4,591 HDD for St. Mary's County), and current EIA state-average energy rates. Oil prices reflect local median from 3 tracked suppliers.
Data updated 2026-06-26.
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If you're staying with oil heat, compare local suppliers to find the best price. The spread in St. Mary's County can be $0.50–$1.00/gallon.
Median: $4.70/gal · 3 suppliers reporting prices
Compare St. Mary's County Suppliers →