Electric Substations in Maryland
186 named substations in Maryland, with the highest-voltage facilities listed first. Each substation profile shows voltage class, connected transmission lines, and the datacenter candidate sites closest to it.
At a glance
How is Maryland's substation network split by voltage?
By maximum voltage, the named substations break down as 9 at 500 kV and above; 44 at 230–344 kV; 46 at 115–229 kV; 12 at 69–114 kV; 75 withvoltage not recorded. 5% of Maryland's named substations operate at 345 kV or above, against 8% across all 16,654 named US substations. The state median of 138 kV is above the national median of 115 kV.
How does Maryland compare with other states?
Maryland ranks 24th of 50 states and DC by number of named substations and 40th by named substations at 345 kV or above. It also has 1,031 scored datacenter candidate sites with an average DC Readiness score of 52.9 (national average 53), and an average power sub-score of 39.1 against 37.4 nationally. Most of those sites (1,031) are in the PJM market.
Which substations in Maryland have the highest voltage?
| Substation | Max voltage | Connected lines | Line owner |
|---|---|---|---|
| BLACK OAK | 500 kV | 6 | THE POTOMAC EDISON CO |
| BRIGHTON | 500 kV | 11 | BALTIMORE GAS & ELECTRIC CO |
| BURCHES HILL | 500 kV | 9 | POTOMAC ELECTRIC POWER CO |
| CALVERT CLIFFS | 500 kV | 6 | BALTIMORE GAS & ELECTRIC CO |
| CHALK POINT | 500 kV | 18 | VIRGINIA ELECTRIC & POWER CO |
| CONASTONE | 500 kV | 8 | BALTIMORE GAS & ELECTRIC CO |
| DOUBS | 500 kV | 13 | THE POTOMAC EDISON COMPANY |
| ROCK SPRINGS | 500 kV | 4 | DELMARVA POWER |
| WAUGH CHAPEL | 500 kV | 17 | BALTIMORE GAS & ELECTRIC CO |
| AQUASCO | 230 kV | 11 | POTOMAC ELECTRIC POWER CO |
| BAGLEY | 230 kV | 2 | BALTIMORE GAS & ELECTRIC CO |
| BELLS MILL | 230 kV | 6 | POTOMAC ELECTRIC POWER CO |
| BOWIE | 230 kV | 13 | BALTIMORE GAS & ELECTRIC CO |
| BRANDON SHORES | 230 kV | 14 | BALTIMORE GAS & ELECTRIC CO |
| BUENA VISTA | 230 kV | 2 | BALTIMORE GAS & ELECTRIC CO |
| BURTONSVILLE | 230 kV | 15 | BALTIMORE GAS & ELECTRIC CO |
| CLARKSBURG | 230 kV | 2 | THE POTOMAC EDISON CO |
| COLORA | 230 kV | 3 | DELMARVA POWER |
| COLUMBIA | 230 kV | 5 | BALTIMORE GAS & ELECTRIC CO |
| DICKERSON | 230 kV | 7 | THE POTOMAC EDISON CO |
| FREDERICK | 230 kV | 4 | THE POTOMAC EDISON COMPANY |
| GRACETON | 230 kV | 7 | DELMARVA POWER |
| GRANITE | 230 kV | 9 | BALTIMORE GAS & ELECTRIC CO |
| HAWKINS GATE | 230 kV | 13 | VIRGINIA ELECTRIC & POWER CO |
| HEWITT ROAD SWITCHING STATION | 230 kV | 8 | VIRGINIA ELECTRIC & POWER CO |
| HIGH RIDGE | 230 kV | 10 | BALTIMORE GAS & ELECTRIC CO |
| HOLLAND CLIFF | 230 kV | 5 | BALTIMORE GAS & ELECTRIC CO |
| HOWARD | 230 kV | 7 | BALTIMORE GAS & ELECTRIC CO |
| JERICHO | 230 kV | 4 | BALTIMORE GAS & ELECTRIC CO |
| LIME KILN | 230 kV | 5 | THE POTOMAC EDISON COMPANY |
| MCCAIN | 230 kV | 2 | THE POTOMAC EDISON COMPANY |
| METZEROTT ROAD | 230 kV | 8 | POTOMAC ELECTRIC POWER CO |
| MONOCACY | 230 kV | 6 | THE POTOMAC EDISON COMPANY |
| MORGANTOWN | 230 kV | 12 | VIRGINIA ELECTRIC & POWER CO |
| MOUNT ZION | 230 kV | 12 | POTOMAC ELECTRIC POWER CO |
| NORBECK | 230 kV | 4 | POTOMAC ELECTRIC POWER CO |
| NORTHEAST | 230 kV | 11 | BALTIMORE GAS & ELECTRIC CO |
| NORTHWEST | 230 kV | 7 | BALTIMORE GAS & ELECTRIC CO |
| OAK GROVE | 230 kV | 16 | POTOMAC ELECTRIC POWER CO |
| PALMERS CORNER | 230 kV | 12 | POTOMAC ELECTRIC POWER CO |
| PUMPHREY | 230 kV | 15 | BALTIMORE GAS & ELECTRIC CO |
| QUINCE ORCHARD | 230 kV | 12 | POTOMAC ELECTRIC POWER CO |
| RAPHAEL ROAD SWITCHING STATION | 230 kV | 6 | BALTIMORE GAS & ELECTRIC CO |
| RINGGOLD | 230 kV | 6 | THE POTOMAC EDISON COMPANY |
| RITCHIE | 230 kV | 9 | POTOMAC ELECTRIC POWER CO |
| RIVERSIDE (230KV) | 230 kV | 10 | BALTIMORE GAS & ELECTRIC CO |
| RYCEVILLE | 230 kV | 6 | VIRGINIA ELECTRIC & POWER CO |
| SANDY SPRING | 230 kV | 2 | BALTIMORE GAS & ELECTRIC CO |
| SOLLERS WARF | 230 kV | 4 | BALTIMORE GAS & ELECTRIC CO |
| TALBERT TAP | 230 kV | 11 | POTOMAC ELECTRIC POWER CO |
| TOKOMA | 230 kV | 7 | POTOMAC ELECTRIC POWER CO |
| WAGNER | 230 kV | 11 | BALTIMORE GAS & ELECTRIC CO |
| WILDE LAKE | 230 kV | 2 | BALTIMORE GAS & ELECTRIC CO |
| ANTIETAM | 138 kV | 2 | THE POTOMAC EDISON COMPANY |
| BETHESDA | 138 kV | 8 | POTOMAC ELECTRIC POWER CO |
| CATOCTIN | 138 kV | 4 | THE POTOMAC EDISON COMPANY |
| EAST HAGERSTOWN | 138 kV | 2 | THE POTOMAC EDISON COMPANY |
| FROSTBURG #1 | 138 kV | 3 | ALLEGHENY POWER SYSTEMS |
| HILLSBORO | 138 kV | 2 | DELMARVA POWER |
| REID | 138 kV | 5 | THE POTOMAC EDISON COMPANY |
Every named substation in Maryland
All 186 named substations, grouped by voltage band.
500 kV and above · 9
230–344 kV · 44
- AQUASCO
- BAGLEY
- BELLS MILL
- BOWIE
- BRANDON SHORES
- BUENA VISTA
- BURTONSVILLE
- CLARKSBURG
- COLORA
- COLUMBIA
- DICKERSON
- FREDERICK
- GRACETON
- GRANITE
- HAWKINS GATE
- HEWITT ROAD SWITCHING STATION
- HIGH RIDGE
- HOLLAND CLIFF
- HOWARD
- JERICHO
- LIME KILN
- MCCAIN
- METZEROTT ROAD
- MONOCACY
- MORGANTOWN
- MOUNT ZION
- NORBECK
- NORTHEAST
- NORTHWEST
- OAK GROVE
- PALMERS CORNER
- PUMPHREY
- QUINCE ORCHARD
- RAPHAEL ROAD SWITCHING STATION
- RINGGOLD
- RITCHIE
- RIVERSIDE (230KV)
- RYCEVILLE
- SANDY SPRING
- SOLLERS WARF
- TALBERT TAP
- TOKOMA
- WAGNER
- WILDE LAKE
115–229 kV · 46
- ANTIETAM
- BETHESDA
- CATOCTIN
- EAST HAGERSTOWN
- FROSTBURG #1
- HILLSBORO
- REID
- WALKERSVILLE
- WYE MILLS
- BLADENSBURG
- CENTER
- COLDSPRING
- CRYSTAL SPRINGS
- EAST TOWSON
- EASTPOINT
- ERDMAN
- FIVE FORKS
- FREDERICK ROAD
- FULLERTON
- GM ALISON
- GOLDEN RING
- GRAY MANOR
- GREENE STREET STATION
- GUNPOWDER
- HARFORD
- HAZELWOOD
- HIGHLANDTOWN
- HOLLOFIELD
- HOLLOFIELD
- HONEYGO
- JOPPATOWNE
- LANHAM
- MARRIOTT HILL
- MAYS CHAPEL
- MIDDLE RIVER
- MONUMENT STREET
- MOUNT WASHINGTON
- NOTCH CLIFF
- ORCHARD ST
- RIVA ROAD
- RIVERSIDE (115KV)
- TUXEDO
- VIADUCT AVENUE
- WESTPORT
- WILDERCROFT
- WINDY EDGE STATION
69–114 kV · 12
voltage not recorded · 75
- BAY RIDGE
- BEDFORD ROAD
- BELTSVILLE
- BENGIES
- BETHANY
- BEVERLY FARMS
- BGE TIMONIUM
- BLACK OAK
- BRANCHVILLE
- BUREAU OF STANDARDS
- CAMP SPRINGS
- CAMPUS DRIVE
- CARDEROCK
- CECIL
- CENTRAL AVENUE
- CHESAPEAKE BEACH
- COLESVILLE
- CONTEE ROAD
- CRAIN HIGHWAY
- DERWOOD
- EMORY GROVE
- FAIRLAND
- FOUR CORNERS
- FRIENDSHIP MANOR
- GERMANTOWN
- GLEN BURNIE
- GLENARDEN
- GRANT AVENUE
- HANCOCK
- HIGHLAND
- HUNT CLUB
- HUNTING HILL
- KENSINGTON
- LAUREL
- LEVITT
- LINDEN
- LIVINGSTON ROAD
- LOCHERN
- LONG REACH
- LONGWOOD
- MARIDEL
- METRO
- MIDDLEBROOK
- MITCHELLVILLE
- MONTGOMERY VILLAGE
- MONTPELIER
- NASA
- NIH
- OCEAN CITY
- PAINTERS MILL
- PARKLAWN
- PERRYVILLE
- POTOMAC
- PRIEST BRIDGE
- RANDLE CLIFF
- RIVERDALE
- ROCKVILLE
- ROSSMOOR SOUTH
- SAINT BARNABAS
- SEAT PLEASANT
- SEEK LANE
- SHAWAN RD
- SLIGO
- STEED ROAD
- SUITLAND
- TEXAS
- THURMONT
- TOAPING CASTLE
- TWINBROOK
- URBANA
- VEIRS MILL
- WHEATON
- WHITE OAK
- WILKENS
- WOOD ACRES
Frequently asked questions
How many electric substations are in Maryland?
HIFLD records 716 substations in Maryland, of which 186 carry a station name. That is the 24th-most named substations of any state in the dataset.
What is the highest-voltage substation in Maryland?
9 named substations in Maryland share the top voltage of 500 kV, including BLACK OAK, BRIGHTON, BURCHES HILL.
Which substation in Maryland connects the most transmission lines?
WINDY EDGE STATION has the most connected transmission lines of the named substations listed here, with 20 at up to 115 kV.
How many substations in Maryland are 345 kV or higher?
9 of 186 named substations (5%) operate at 345 kV or above, compared with 8% nationally. Maryland ranks 40th of 50 states and DC for named substations at that level.
How many datacenter candidate sites in Maryland are at substations?
314 of the 1,031 scored candidate sites in Maryland are substation sites — locations generated at an existing substation. Scored sites across Maryland average 52.9 on the 0–100 DC Readiness scale, against 53 nationally.
Looking for a specific record? The directory lists every substation in Maryland, A to Z.
More on Maryland, and states with similar counts
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “Electric substations in Maryland”, https://gridcensus.com/substations/maryland (data as of June 29, 2026).
Dataset updated . Screening estimates derived from public data sources.
Go deeper than the public screen
Every site and score for substations in Maryland is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.