Cairo, Ohio sales tax rate: 6.85%
Last updated Checked monthly
The sales tax rate in Cairo, Ohio is 6.85%. That’s the 5.75% state rate plus 1.1% in local taxes. It’s higher than 70 of the 260 Ohio cities we checked, and 3 other cities pay the same.
Calculated by the 
Sales Tax APIThe same engine Zamp customers use.Cairo combined rate
6.85%
- Ohio state
- 5.75%
- Allen CountyCounty
- 1%
- Allen County RTASpecial district
- 0.1%
Cairo sales tax calculator
Enter a price and what you’re selling.
- OhioState · 5.75%$5.75
- Allen CountyCounty · 1%$1.00
- Allen County RTASpecial district · 0.1%$0.10
Charging this at checkout? Zamp calculates it on every order and files the returns.
Book a demoCairo sales tax rate breakdown
State, county and special district taxes add up to 6.85%. District lines don’t follow city limits, so some Cairo addresses pay a different rate.
| Jurisdiction | Type | Rate |
|---|---|---|
| State of Ohio | State | 5.75% |
| Allen County | County | 1% |
| Allen County RTA | Special district | 0.1% |
| Combined rate | 6.85% |
Rate history
- July 20236.85%
- July 20246.85%
- July 20256.85%
- July 20266.85%
- Today6.85%
No change since July 2023.
Sales tax near Cairo
Closest cities
- Lima6 mi6.85%
- Lafayette9 mi6.85%
- Bluffton11 mi6.85%
- Waynesfield17 mi7.25%
- Buckland17 mi7.25%
- Middle Point19 mi7.25%
- Wapakoneta19 mi7.25%
- Dunkirk23 mi7.25%
Charge the right rate in Cairo, on every order.
Zamp calculates tax at each customer’s address, special districts included, then files and pays every Ohio return for you, with a sales tax team you can call.
Cairo sales tax questions.
Still have questions? Call us at 1-866-438-9267 or email us at support@zamp.com.
What is the sales tax rate in Cairo, Ohio?
The combined sales tax rate in Cairo is 6.85% as of November 2, 2026. It’s made up of 5.75% Ohio state tax, 1% Allen County, 0.1% Allen County RTA.
Why does Cairo pay Allen County RTA tax?
A special district such as Allen County RTA levies its own sales tax on top of the state, county rates. District lines don’t always follow city limits, so an address a few streets away can have a different rate. This rate was calculated for Cairo’s 45820 ZIP code; the calculator prices any exact address.
Is SaaS taxable in Cairo?
No.
Do online sellers have to collect sales tax in Cairo?
Yes, if they have nexus in Ohio: more than $100,000 in Ohio sales in the previous or current calendar year, or a physical presence in the state. They register with the Ohio Department of Taxation and charge the rate at the buyer’s address.
Sources. Ohio Department of Taxation · Zamp Sales Tax API, for Cairo’s 45820 ZIP code. Rates are checked monthly and are for information, not tax advice.
Sales tax, off your plate.
Zamp registers you, calculates every order at the customer’s address, files every Ohio return and handles notices, with a sales tax team you can call.
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