
In 2025, renting a diesel generator in Oklahoma City typically costs between $100 and $200 per day, $400 to $800 per week, and $1,200 to $2,500 per month. These rates vary based on the generator's power capacity and additional features.
| Vendor | Daily Rate | Weekly Rate | Review Score | Website |
|---|---|---|---|---|
| United Rentals | $180–$350 | $540–$1,050 | 7 | Visit |
| Clifford Power Systems | custom pricing | custom pricing | 9 | Visit |
| Warren CAT | $560 | $1,400 | 8 | Visit |
| Ziegler Rental | $425 | $565 | 8 | Visit |
Several factors affect the rental costs of diesel generators, including the generator's size, duration of hire, and any additional services such as delivery and setup.
When renting a generator, be aware of potential hidden fees. These can include delivery and pick-up charges, which may be flat or mileage-based, fuel surcharges, damage waivers versus full insurance, cleaning fees for excessive dirt or mud, late-return penalties, and overtime usage charges.

The demand for portable diesel generators in Oklahoma City is expected to remain strong in 2025, driven by construction projects and emergency power needs. Rental companies are likely to offer flexible terms to accommodate various project requirements.
Ensure compliance with local regulations regarding emissions and noise levels when renting diesel generators. This is crucial for avoiding fines and ensuring safe operation on job sites.