Assessor

Treasurer

Board of Review

Chief Judge

Clerk of the Circuit Court

County Clerk

Office of the President

Sheriff

Birth Certificate

States Attorney

All `id` attributes on a page must be unique, or accessible technologies used by the page 
can stop working.

## Example

The duplicate `id` here makes it unclear which label belongs to which input field:

```html
<label for="name">Your name</label>
<input id="name">

<label for="name">Company name</label>
<input id="name">
```

As a result, accessible technologies like screen readers can fail to read out the 
correct text, or may read out no text at all.

Similar issues can occur when using `aria-labelledby` and `aria-describedby`.

## How to fix

Ensure all `id` attributes on a page are unique. 

## More information

See [Technique H93](https://www.w3.org/TR/2016/NOTE-WCAG20-TECHS-20161007/H93) 
for more information.

duplicate-id

October 2025

September 2025

Cook County, Illinois

	Title / URL	Issues
	Assessorwww.cookcountyil.gov/agency/assessor	28
	Treasurerwww.cookcountyil.gov/agency/treasurer	20
	Board of Reviewwww.cookcountyil.gov/agency/board-review	12
	Chief Judgewww.cookcountyil.gov/agency/chief-judge	12
	Clerk of the Circuit Courtwww.cookcountyil.gov/agency/clerk-circuit-court	12
	County Clerkwww.cookcountyil.gov/agency/county-clerk	12
	Office of the Presidentwww.cookcountyil.gov/agency/office-president	12
	Sheriffwww.cookcountyil.gov/agency/sheriff	12
	Birth Certificatewww.cookcountyil.gov/service/birth-certificate	12
	States Attorneywww.cookcountyil.gov/agency/states-attorney	12

Fix duplicate IDs

Cook County, Illinois

Where this issue has occurred