Ottawa, Illinois sales tax rate: 7.5%
Last updated Checked monthly
The sales tax rate in Ottawa, Illinois is 7.5%. That’s the 6.25% state rate plus 1.25% in local taxes. It’s higher than 128 of the 331 Illinois cities we checked, and 14 other cities pay the same.
Calculated by the 
Sales Tax APIThe same engine Zamp customers use.Ottawa combined rate
7.5%
- Illinois state
- 6.25%
- Lasalle CountyCounty
- 0.25%
- OttawaCity
- 1%
Ottawa sales tax calculator
Enter a price and what you’re selling.
- IllinoisState · 6.25%$6.25
- Lasalle CountyCounty · 0.25%$0.25
- Ottawa City (Lasalle County)City · 1%$1.00
Charging this at checkout? Zamp calculates it on every order and files the returns.
Book a demoOttawa sales tax rate breakdown
State, county and city taxes add up to 7.5%.
| Jurisdiction | Type | Rate |
|---|---|---|
| State of Illinois | State | 6.25% |
| Lasalle County | County | 0.25% |
| Ottawa City (Lasalle County) | City | 1% |
| Combined rate | 7.5% |
Rate history
- July 20237%
- July 20247%
- July 20257%
- July 20267.5%
- Today7.5%
Changed since July 2023.
Sales tax near Ottawa
Closest cities
- Troy Grove15 mi6.5%
- Streator16 mi7.5%
- Tonica16 mi7.5%
- Peru16 mi7.5%
- Dalzell18 mi7.25%
- Spring Valley19 mi8.25%
- Mendota20 mi7.5%
- Morris21 mi6.25%
Elsewhere in LaSalle County
- Streator7.5%
- Peru7.5%
- Mendota7.5%
- Tonica7.5%
- Troy Grove6.5%
Charge the right rate in Ottawa, on every order.
Zamp calculates tax at each customer’s address, then files and pays every Illinois return for you, with a sales tax team you can call.
Ottawa 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 Ottawa, Illinois?
The combined sales tax rate in Ottawa is 7.5% as of November 2, 2026. It’s made up of 6.25% Illinois state tax, 0.25% Lasalle County, 1% Ottawa City (Lasalle County).
Does the sales tax rate vary within Ottawa?
Ottawa has no special-district taxes, so most addresses in the city pay the same 7.5%: Illinois’s 6.25% plus 0.25% county tax plus 1% city tax. This rate was calculated for Ottawa’s 61350 ZIP code; the calculator prices any exact address.
Is SaaS taxable in Ottawa?
No.
Do online sellers have to collect sales tax in Ottawa?
Yes, if they have nexus in Illinois: more than $100,000 in Illinois sales in the previous or current calendar year, or a physical presence in the state. They register with the Illinois Department of Revenue and charge the rate at the buyer’s address.
Sources. Illinois Department of Revenue · Zamp Sales Tax API, for Ottawa’s 61350 ZIP code. Rates are checked monthly and are for information, not tax advice.
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