Electric companies in St. Mary's County, Maryland

Q: St. Mary's County, MD: what do homes pay for electricity?

No single price in St. Mary's County, MD: 1 utility deliver power and homes pick a plan. Maryland average 17.86 cents per kWh, $166 a month at 929 kWh.

Q: St. Mary's County, MD: how many homes heat with electricity?

St. Mary's County, MD: 24,729 of 41,743 occupied homes, 59.2%, rank 8 of 23.

Q: St. Mary's County, MD: median household income?

$114,580 in St. Mary's County, MD, rank 8 of 23; 114,372 residents, 41,743 households.

Q: St. Mary's County, MD: outage-linked storms since 2015?

St. Mary's County, MD: 229 NWS events, peak year 2019.

Q: St. Mary's County, MD: flood insurance claims since 2015?

St. Mary's County, MD: 88 NFIP flood claims, $1.2M paid, 2.1 per 1,000 homes, 2.4% of homes insured.

Q: How old are the homes in St. Mary's County, MD?

St. Mary's County, MD: median home built 1992; 30.3% predate 1980, 73.3% detached, 11.5% in 5+ unit buildings.

Q: St. Mary's County, MD: share of income for energy?

St. Mary's County, MD homes spend $1,979 a year on electricity, $2,775 on all energy: 2.2% of $126,223; 7.7% for lower incomes.

St. Mary's County, MD ranks 1 of 23 Maryland counties for the newest homes (median year built 1992). St. Mary's County in Maryland has 114,372 residents and 1 utility listed by EIA.

Households in St. Mary's County can pick a supplier. How to compare.

St. Mary's County on the map

St. Mary's County darker: more storm events

Electric utilities in St. Mary's County

Utility listed for St. Mary's County, MD	Type	Home accounts in Maryland
Southern Maryland Elec Coop Inc in St. Mary's County, MD	Cooperative	160,882

Plans from retail suppliers are not in public data, so no plan prices are shown. The listed utilities deliver the power, and which one serves your street depends on the address.

Housing and heating in St. Mary's County

St. Mary's County, MD: 13,943 of 46,078 homes were built before 1980 and 16,500 in 2000 or later. St. Mary's County, MD has 33,775 detached houses, 5,276 homes in 5+ unit buildings, 1,545 mobile homes, and 11,418 of 41,743 households rent.

Age of homes in St. Mary's County, MD

% of homes by decade built, St. Mary's County, MD

3pre-40
240s
550s
560s
1470s
1680s
1890s
2000s
1410s
120+

Heating fuel in St. Mary's County, MD

% of homes by main fuel, St. Mary's County

Electricity59.2
Fuel oil16.0
Utility gas12.0
Propane7.6
Wood2.6
None1.3
Other fuel1.2

St. Mary's County, MD housing against Maryland counties
St. Mary's County, MD	Value	State median	Gap	Rank
St. Mary's County, MD, median year built	1992	1983	+9 years	1 of 23
St. Mary's County, MD, built before 1980	30.3%	45.2%	-14.9 points	21 of 23
St. Mary's County, MD, built 2000 or later	35.8%	21.8%	+14.0 points	1 of 23
St. Mary's County, MD, detached houses	73.3%	70.6%	+2.7 points	9 of 23
St. Mary's County, MD, apartments in 5+ unit buildings	11.5%	11.5%	+0.0 points	12 of 23
St. Mary's County, MD, mobile homes	3.4%	2.7%	+0.6 points	9 of 23
St. Mary's County, MD, renter households	27.4%	27.4%	+0.0 points	12 of 23
St. Mary's County, MD, median home value	$390,900	$367,300	+$23,600	11 of 23
St. Mary's County, MD, median gross rent a month	$1,692	$1,370	+$322	8 of 23
St. Mary's County, MD, people per household	2.68	2.57	+0.11	8 of 23

ZIP codes in St. Mary's County

20606
20609
20618
20619
20620
20621
20624
20626
20628
20630
20634
20636
20650
20653
20656
20659
20660
20667
20670
20674
20680
20684
20686
20687
20690
20692

Facts about St. Mary's County

Residents of St. Mary's County, MD, ACS 2023: 114,37211 of 23 Maryland counties
Households in St. Mary's County, MD: 41,7432.74 people each
Owner-occupied homes in St. Mary's County, MD: 72.6%30,325 owner and 11,418 renter households
Median household income in St. Mary's County, MD: $114,5808 of 23 Maryland counties
Housing units in St. Mary's County, MD: 46,0784,335 vacant or seasonal, 9.4% of the units
Homes heated by electricity in St. Mary's County, MD: 59.2%24,729 homes, 8 of 23 Maryland counties
Utilities listed for St. Mary's County, MD: 11 with a home price: Southern Maryland Elec Coop Inc
ZIP areas touching St. Mary's County, MD: 2620606 to 20692
Outage-linked storm events in St. Mary's County, MD: 229NWS storm events, 2015 to 2025
Homes built before 1980 in St. Mary's County, MD: 30.3%median year built 1992
Flood claims in St. Mary's County, MD: 88NFIP 2015 to 2025, $1.2M paid
Home energy burden in St. Mary's County, MD: 2.2%$1,979 a year on electricity (DOE LEAD)

Cost of living with electricity in St. Mary's County

St. Mary's County, MD: electricity $1,979 a year per home (DOE LEAD), all home energy $2,775, 2.2% of $126,223 income. 41,211 households in St. Mary's County, MD spend about $81.6 million a year on electricity and $114.4 million on all home energy. Lower-income homes in St. Mary's County, MD ($25,566 a year) spend 7.7% of income, 3.5 times the all-home figure.

Energy burden in St. Mary's County, MD

% of income on energy, St. Mary's County, MD

All households2.2
Lower income7.7
Owners2.2
Renters2.3
Maryland counties1.8

St. Mary's County, MD home energy cost by household group
St. Mary's County, MD	Homes	Income	Power	Gas	Other	Burden
St. Mary's County, MD, all households	41,211	$126,223	$1,979	$391	$405	2.2%
St. Mary's County, MD, lower income	9,574	$25,566	$1,454	$235	$270	7.7%
St. Mary's County, MD, owners	29,865	$150,216	$2,278	$478	$515	2.2%
St. Mary's County, MD, renters	11,346	$63,070	$1,192	$164	$116	2.3%

Outage risk in St. Mary's County

St. Mary's County, MD, NWS storm events 2015 to 2025: 229 in all, 200.2 per 100,000 residents of 114,372, rank 9 of 23 Maryland counties. Property damage in St. Mary's County, MD: $7.4M, with 1 direct injuries or deaths.

Events by year in St. Mary's County, MD

events a year, St. Mary's County, MD

18'15
22'16
22'17
12'18
32'19
23'20
31'21
19'22
12'23
18'24
20'25

Events by type

events by type, St. Mary's County, MD

Thunderstorm and high wind161
Heat wave44
Winter storm and heavy snow14
Tornado7
Ice storm2
Hurricane and tropical storm1

St. Mary's County, MD outage-linked hazards
St. Mary's County, MD	FEMA	Score	Rank	Events	Peak	Damage
St. Mary's County, MD, thunderstorm and high wind	Relatively Moderate	65.2	14 of 23	161	2021 (25)	$6.2M
St. Mary's County, MD, tornado	Relatively Low	39.4	9 of 23	7	2020 (2)	$460K
St. Mary's County, MD, hurricane and tropical storm	Relatively Moderate	85.1	11 of 23	1	2020 (1)	$750K
St. Mary's County, MD, ice storm	Relatively Low	53.8	10 of 23	2	2015 (1)	$0
St. Mary's County, MD, winter storm and heavy snow	Relatively Low	58.1	18 of 23	14	2015 (3)	$0
St. Mary's County, MD, heat wave	Relatively Low	67.3	15 of 23	44	2019 (8)	$0

Flood claims and flood insurance in St. Mary's County

St. Mary's County, MD: 88 NFIP flood claims in 2015 to 2025, $1.2M paid, median paid claim $14,577.

990 of 41,939 residential structures in St. Mary's County, MD carry an NFIP contract. 1,045 NFIP policies of any type were in force in St. Mary's County, MD on 8 Sep 2026. St. Mary's County, MD lists 65 repetitive-loss properties, 5 of them severe repetitive loss.

St. Mary's County, MD: claims history, not an outage count.

Flood claims by year in St. Mary's County, MD

flood claims a year, St. Mary's County, MD

6'15
<5'16
<5'17
11'18
<5'19
27'20
27'21
<5'22
<5'23
<5'24
<5'25

St. Mary's County, MD flood claims and flood insurance
St. Mary's County, MD	Value	Median county	Rank
St. Mary's County, MD, claims 2015-2025	88	—	10 of 23
St. Mary's County, MD, paid 2015-2025	$1.2M	—	14 of 23
St. Mary's County, MD, median paid claim	$14,577	—	—
St. Mary's County, MD, claims per 1,000 homes	2.1	1.9	10 of 23
St. Mary's County, MD, homes with flood insurance	2.4%	1.2%	8 of 24
St. Mary's County, MD, policies in force	1,045	—	—
St. Mary's County, MD, repetitive-loss properties	65	—	—

St. Mary's County, MD: OpenFEMA NFIP, claims as of 8 Sep 2026, insured share as of 3 Aug 2026; counts under 5 are hidden.

St. Mary's County: flood claims by state, flood hub.

Analyst note on St. Mary's County

St. Mary's County, MD touches 26 ZIP areas, 20606 to 20692, about 4,399 residents each. St. Mary's County, MD counts 114,372 residents in 41,743 households. Household income in St. Mary's County, MD is $114,580; 30,325 of its 41,743 households own.

24,729 of the 41,743 homes in St. Mary's County, MD heat with electricity. St. Mary's County, MD has 46,078 housing units, 4,335 (9.4%) vacant or seasonal, and 11,418 rented homes. St. Mary's County, MD logged 229 storm events for its 114,372 residents.

The median home in St. Mary's County, MD dates from 1992. Homes in St. Mary's County, MD pay $1,979 a year for electricity.

Bill and heat pump calculator, St. Mary's County

Compare St. Mary's County with its neighbours

Calvert County sits 20 miles north of St. Mary's County, MD with 93,791 residents, 192 storm events, median home built 1990, energy burden 2.0%, income $132,059.
Dorchester County sits 30 miles northeast of St. Mary's County, MD with 32,612 residents, 89 storm events, median home built 1973, energy burden 3.4%, income $60,495.
Charles County sits 31 miles northwest of St. Mary's County, MD with 168,710 residents, 252 storm events, median home built 1990, energy burden 2.2%, income $120,592.
Talbot County sits 41 miles northeast of St. Mary's County, MD with 37,707 residents, 124 storm events, median home built 1982, energy burden 2.4%, income $84,378.
Prince George's County sits 47 miles northwest of St. Mary's County, MD with 955,584 residents, 295 storm events, median home built 1977, energy burden 2.0%, income $100,708.

Maryland: home prices since 2001, planned plants.

Questions on St. Mary's County

St. Mary's County, MD: what do homes pay for electricity?