Datacenter Sites in Johnson County, Iowa
Johnson County has 120 scored datacenter candidate sites averaging 59.9/100 DC Readiness, with a catalogued aggregate of 6,806 MW. FEMA rates local natural-hazard risk as "Relatively Moderate". The county has a datacenter tax incentive on record.
120
Candidate sites
59.9/100
Avg DC Readiness
6,806 MW
Catalogued capacity
theoretical aggregate
Relatively Moderate
Hazard rating
Site-selection context for Johnson County
Yessales_tax_exemption
Datacenter tax incentive
11.80¢/kWh
Commercial electricity
7.69¢/kWh
Industrial electricity
18
Fiber providers
Low
Water stress
$10,307
Land price / acre
900
Cooling degree days
6,500
Heating degree days
48°F
Mean annual temp
Incentive detail: Sales tax exemption on DC equipment for $1M+ investments; property tax phase-in for new construction.
By site type
Top datacenter sites in Johnson County
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| TIFFIN | Substation-Adjacent | 345 kV | 600 MW | 2.8 yrs | 68.7 |
| EC Near University of Iowa Main Power Plant | Greenfield | — | — | 1.4 yrs | 68.2 |
| HILLS | Substation-Adjacent | 345 kV | 600 MW | 2.8 yrs | 67.0 |
| EC Near University of Iowa Main Power Plant | Greenfield | — | — | 1.4 yrs | 65.1 |
| EC Near University of Iowa Main Power Plant | Greenfield | — | — | 1.4 yrs | 64.3 |
| EC Near University of Iowa Main Power Plant | Greenfield | — | — | 1.4 yrs | 64.3 |
| UNKNOWN159106 | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 64.1 |
| RISER137658 | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 64.0 |
| UNKNOWN137654 | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 63.9 |
| UNKNOWN132168 | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 62.9 |
| UNKNOWN137657 | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 62.8 |
| UNKNOWN132171 | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 62.7 |
| UNKNOWN137652 | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 62.5 |
| UNKNOWN132172 | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 62.5 |
| University of Iowa Main Power Plant | Brownfield | — | 6 MW | 1.4 yrs | 62.2 |
| UNKNOWN132173 | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 62.2 |
| UNKNOWN137713 | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 62.1 |
| SUTLIFF | Substation-Adjacent | 115 kV | 100 MW | 2.8 yrs | 61.4 |
| WEST BRANCH | Substation-Adjacent | 115 kV | 100 MW | 2.8 yrs | 61.1 |
| EC Near University of Iowa Main Power Plant | Greenfield | — | — | 1.4 yrs | 59.4 |
| EC Near University of Iowa Main Power Plant | Greenfield | — | — | 1.4 yrs | 58.9 |
| EC Near University of Iowa Main Power Plant | Greenfield | — | — | 1.4 yrs | 58.9 |
| Mine Site | Former Mine | — | — | 2.8 yrs | 58.2 |
| Grell Property | Industrial | — | — | 2.8 yrs | 58.0 |
| Summit Hills | Industrial | — | — | 2.8 yrs | 58.0 |
Johnson County datacenter FAQ
- How many datacenter sites are in Johnson County?
- 120 scored datacenter candidate sites, averaging 59.9/100 DC Readiness.
- Does Johnson County offer datacenter tax incentives?
- Sales tax exemption on DC equipment for $1M+ investments; property tax phase-in for new construction.
- What is the natural-hazard risk in Johnson County?
- FEMA's National Risk Index rates Johnson County as "Relatively Moderate" (score 30).
- What are industrial electricity rates in Johnson County?
- Average industrial electricity is 7.69¢/kWh and commercial is 11.80¢/kWh in Johnson County.
Dataset updated . Screening estimates derived from public data sources.
Go deeper than the public screen
This page shows a public slice of the GridCensus dataset for Johnson County, Iowa. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.