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Datacenter Sites in St. Louis County, Missouri

St. Louis County has 363 scored datacenter candidate sites averaging 55.7/100 DC Readiness, with a catalogued aggregate of 3,500 MW. FEMA rates local natural-hazard risk as "Relatively High". The county has a datacenter tax incentive on record.

At a glance

St. Louis County, Missouri has 363 scored datacenter candidate sites averaging 55.7/100 DC Readiness, roughly in line with the Missouri average of 55.7. It ranks 3rd of 110 Missouri counties by number of sites and 30th by average score. The top-scoring site is MASON at 67.3/100.

363
Candidate sites
55.7/100
Avg DC Readiness
3,500 MW
Catalogued capacity
theoretical aggregate
Relatively High
Hazard rating
◆ Loading map…
≥ 7560–7540–60≤ 40
Top 25 in St. Louis County

Site-selection context for St. Louis County

Yessales_tax_exemption
Datacenter tax incentive
10.33¢/kWh
Commercial electricity
8.24¢/kWh
Industrial electricity
9
Fiber providers
Low
Water stress
$10,928
Land price / acre
1,500
Cooling degree days
4,700
Heating degree days
56°F
Mean annual temp

Incentive detail: Qualified data center sales tax exemption (2019 law); state income tax credits.

How does St. Louis County compare with other counties in Missouri?

By number of scored sites, St. Louis County ranks 3rd of the 110 Missouri counties with a county page, holding 11% of the state's 3,413 sites. Its average DC Readiness of 55.7/100 ranks 30th in the state and is roughly in line with the national average of 53.0. Nationally it has the 31st-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 338 score 55 or higher.

What types of datacenter sites are in St. Louis County?

Industrial sites are the most common (309, 85% of the county's inventory), followed by substation-adjacent (20) and greenfield (14). 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. Louis County?

Industrial electricity averages 8.24¢/kWh and commercial 10.33¢/kWh. FEMA's National Risk Index rates the county "Relatively High" (38). WRI water stress is low. 9 fiber providers report service in the county. The climate runs 1,500 cooling degree days a year with a mean temperature of 56°F. Land is valued around $10,928 an acre.

By site type

Top datacenter sites in St. Louis County

Top datacenter sites in St. Louis County
SiteTypeVoltageCapacityQueue waitScore
MASONSubstation-Adjacent345 kV600 MW4.3 yrs67.3
UNKNOWN117706Substation-Adjacent345 kV600 MW4.3 yrs66.2
TYSONSubstation-Adjacent345 kV600 MW4.3 yrs66.1
EC Near Howard BendGreenfield——4.3 yrs64.7
OZ St. LouisGreenfield——4.3 yrs63.9
OZ St. LouisGreenfield——4.3 yrs63.7
OZ St. LouisGreenfield——4.3 yrs63.4
OZ St. LouisGreenfield——4.3 yrs63.1
UNKNOWN117897Substation-Adjacent138 kV100 MW4.3 yrs62.6
UNKNOWN168411Substation-Adjacent138 kV100 MW4.3 yrs62.5
EC Coal St. Louis CountyGreenfield——4.3 yrs62.2
EC Coal St. Louis CountyGreenfield——4.3 yrs61.9
EC Near MeramecGreenfield——4.3 yrs61.9
UNKNOWN117130Substation-Adjacent138 kV100 MW4.3 yrs61.7
TAP139463Substation-Adjacent138 kV100 MW4.3 yrs61.6
DEADEND168412Substation-Adjacent138 kV100 MW4.3 yrs61.5
UNKNOWN117944Substation-Adjacent138 kV100 MW4.3 yrs61.4
TAP139464Substation-Adjacent138 kV100 MW4.3 yrs61.3
UNKNOWN117802Substation-Adjacent138 kV100 MW4.3 yrs61.3
UNKNOWN117745Substation-Adjacent138 kV100 MW4.3 yrs61.1
TAP139458Substation-Adjacent138 kV100 MW4.3 yrs61.1
TAP139466Substation-Adjacent138 kV100 MW4.3 yrs61.0
UNKNOWN117841Substation-Adjacent138 kV100 MW4.3 yrs61.0
UNKNOWN117890Substation-Adjacent138 kV100 MW4.3 yrs60.9
TAP139452Substation-Adjacent138 kV100 MW4.3 yrs60.9

Every scored site in St. Louis County

All 363 sites, best first.

St. Louis County datacenter FAQ

How many datacenter sites are in St. Louis County?

363 scored datacenter candidate sites, averaging 55.7/100 DC Readiness. That is the 3rd-most of 110 Missouri counties with five or more sites.

What is the highest-scoring datacenter site in St. Louis County?

MASON scores 67.3/100 DC Readiness, the highest of the 363 scored sites in St. Louis County (a substation-adjacent site).

Does St. Louis County offer datacenter tax incentives?

Qualified data center sales tax exemption (2019 law); state income tax credits.

What is the natural-hazard risk in St. Louis County?

FEMA's National Risk Index rates St. Louis County as "Relatively High" (score 38).

What are industrial electricity rates in St. Louis County?

Average industrial electricity is 8.24¢/kWh and commercial is 10.33¢/kWh in St. Louis County.

More in Missouri

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 November 12, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.

Cite as: GridCensus, “Datacenter candidate sites in St. Louis County, Missouri”, https://gridcensus.com/datacenter-sites/missouri/st-louis-county (data as of November 12, 2026).

Dataset updated . Screening estimates derived from public data sources.

Go deeper than the public screen

Every site and score for St. Louis County, Missouri 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.

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