IT services in O'Fallon, IL: 2026 report
504 ranked entriesUpdated 7 trade lists
The 7 service lists for O'Fallon, IL hold 504 ranked entries. Managed IT service providers have the most, with 135.
Key numbers for O'Fallon
Shares use ranked businesses as their base. An IT firm in two service lists counts in both.
504
ranked entries by IFR Score, in 7 service lists
899
service listings serving the city; an IT firm counts once per service
4.9
median of the services’ median Google ratings
IT services in O'Fallon, by ranked IT firms
| Service | Ranked | Serving the city | Median rating | Median reviews |
|---|---|---|---|---|
| Managed IT service providers | 135 | 254 | 4.9 | 13 |
| IT consultants | 108 | 200 | 4.9 | 11 |
| Cybersecurity companies | 78 | 127 | 4.9 | 16 |
| Business phone system providers | 53 | 94 | 4.8 | 11 |
| Network cabling and installation companies | 47 | 80 | 4.9 | 11 |
| Data recovery services | 43 | 64 | 4.9 | 13 |
| Computer repair shops | 40 | 80 | 4.8 | 16 |
Method and basis
- Serving counts are active, de-duplicated IT firms within each service’s service radius of O'Fallon, as of November 9, 2026.
- Ranked IT firms have a confident service match and 3 or more Google reviews, or a claimed profile.
- Median rating, median reviews and the shares are measured over ranked businesses.
- Figures are recalculated with each weekly data update. This page shows the latest figures for the year in its title.
Cite this report: ITFirmsRanked, “IT Services in O'Fallon, IL: 2026 Report”, https://www.itfirmsranked.com/reports/ofallon-il-it-services-2026, data as of November 9, 2026.
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