Skip to content
Gridcensus

Datacenter Sites in St. Mary Parish, Louisiana

St. Mary Parish has 25 scored datacenter candidate sites averaging 51.1/100 DC Readiness, with a catalogued aggregate of 1,100 MW. FEMA rates local natural-hazard risk as "Very High". The county has a datacenter tax incentive on record.

At a glance

St. Mary Parish, Louisiana has 25 scored datacenter candidate sites averaging 51.1/100 DC Readiness, roughly in line with the Louisiana average of 53.1. It ranks 19th of 59 Louisiana counties by number of sites and 40th by average score. The top-scoring site is Substation-Adjacent site · da26a292 at 57.9/100.

25
Candidate sites
51.1/100
Avg DC Readiness
1,100 MW
Catalogued capacity
theoretical aggregate
Very High
Hazard rating
◆ Loading map…
≥ 7560–7540–60≤ 40
Top 25 in St. Mary Parish

Site-selection context for St. Mary Parish

Yessales_tax_exemption
Datacenter tax incentive
11.46¢/kWh
Commercial electricity
8.01¢/kWh
Industrial electricity
5
Fiber providers
Low
Water stress
$3,498
Land price / acre
2,700
Cooling degree days
1,700
Heating degree days
67°F
Mean annual temp

Incentive detail: Industrial Tax Exemption Program (ITEP) up to 80% property tax abatement for 10 years.

How does St. Mary Parish compare with other counties in Louisiana?

By number of scored sites, St. Mary Parish ranks 19th of the 59 Louisiana counties with a county page, holding 1.4% of the state's 1,762 sites. Its average DC Readiness of 51.1/100 ranks 40th in the state and is roughly in line with the national average of 53.2. Nationally it has the 1462nd-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 4 score 55 or higher.

What types of datacenter sites are in St. Mary Parish?

Greenfield sites are the most common (14, 56% of the county's inventory), followed by substation-adjacent (7) and industrial (4). Site type reflects how the parcel was identified — next to a substation, on a former mine or brownfield, on industrial or federal excess land — and is scored on the same 14 factors either way.

What are power cost, hazard, water and fiber conditions in St. Mary Parish?

Industrial electricity averages 8.01¢/kWh and commercial 11.46¢/kWh. FEMA's National Risk Index rates the county "Very High" (58). WRI water stress is low. 5 fiber providers report service in the county. The climate runs 2,700 cooling degree days a year with a mean temperature of 67°F. Land is valued around $3,498 an acre.

By site type

Top datacenter sites in St. Mary Parish

Top datacenter sites in St. Mary Parish
SiteTypeVoltageCapacityQueue waitScore
TAP149895Substation-Adjacent230 kV300 MW4.3 yrs57.9
BAYOU VISTASubstation-Adjacent230 kV300 MW4.3 yrs57.8
UNKNOWN111873Substation-Adjacent138 kV100 MW4.3 yrs57.3
OZ St. MaryGreenfield——4.3 yrs56.0
EC Near TecheGreenfield——4.3 yrs54.8
UNKNOWN112601Substation-Adjacent138 kV100 MW4.3 yrs53.9
UNKNOWN115692Substation-Adjacent138 kV100 MW4.3 yrs53.9
UNKNOWN115690Substation-Adjacent138 kV100 MW4.3 yrs52.9
UNKNOWN115691Substation-Adjacent138 kV100 MW4.3 yrs52.9
EC Near Morgan CityGreenfield——4.3 yrs51.8
EC Near TecheGreenfield——4.3 yrs51.5
EC Near TecheGreenfield——4.3 yrs50.4
EC Near TecheGreenfield——4.3 yrs50.3
EC Near Morgan CityGreenfield——4.3 yrs50.2
EC Near Morgan CityGreenfield——4.3 yrs49.3
EC Near TecheGreenfield——4.3 yrs49.2
EC Near Morgan CityGreenfield——4.3 yrs48.8
EC Near TecheGreenfield——4.3 yrs48.6
EC Near Morgan CityGreenfield——4.3 yrs48.6
EC FFE St. Mary ParishGreenfield——4.3 yrs48.3
Baldwin Elementary SchoolIndustrial——4.3 yrs47.5
Clausen Boudreaux EstateIndustrial——4.3 yrs47.4
Franklin Foundation HospitalIndustrial——4.3 yrs47.3
Patterson Air PortIndustrial——4.3 yrs47.1
EC Near TecheGreenfield——4.3 yrs43.3

Every scored site in St. Mary Parish

All 25 sites, best first.

St. Mary Parish datacenter FAQ

How many datacenter sites are in St. Mary Parish?

25 scored datacenter candidate sites, averaging 51.1/100 DC Readiness. That is the 19th-most of 59 Louisiana counties with five or more sites.

What is the highest-scoring datacenter site in St. Mary Parish?

Substation-Adjacent site · da26a292 scores 57.9/100 DC Readiness, the highest of the 25 scored sites in St. Mary Parish (a substation-adjacent site).

Does St. Mary Parish offer datacenter tax incentives?

Industrial Tax Exemption Program (ITEP) up to 80% property tax abatement for 10 years.

What is the natural-hazard risk in St. Mary Parish?

FEMA's National Risk Index rates St. Mary Parish as "Very High" (score 58).

What are industrial electricity rates in St. Mary Parish?

Average industrial electricity is 8.01¢/kWh and commercial is 11.46¢/kWh in St. Mary Parish.

More in Louisiana

About this data

Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published October 10, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.

Cite as: GridCensus, “Datacenter candidate sites in St. Mary Parish, Louisiana”, https://gridcensus.com/datacenter-sites/louisiana/st-mary-parish (data as of October 10, 2026).

Dataset updated . Screening estimates derived from public data sources.

Go deeper than the public screen

Every site and score for St. Mary Parish, Louisiana 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.

See plansTalk to us