Do You Need a Witness to Get Married in Illinois?

No, you do not need a witness to get married in Illinois. The state’s Marriage and Dissolution of Marriage Act sets three requirements for a valid marriage: it must be licensed, solemnized by an authorized person, and registered with the county clerk. Witnesses are not on that list, and no county clerk’s office in Illinois conditions a marriage license on bringing them.¹

So if it is just the two of you and an officiant at the courthouse, in a park, or in a living room, the marriage is legal. No one else needs to sign anything. No one else needs to be in the room.

Why So Many People Think Witnesses Are Required

Witnesses show up at most weddings because of tradition, religious custom, or the simple fact that couples want family and friends present. Several faith traditions require witnesses as part of their own ceremonies, and older marriage license forms in other states include signature lines for them. That history leads a lot of couples to assume the state wants the same thing. Illinois does not. The ceremony itself has no required format, no required words, and no required audience.

What Illinois Actually Requires

Three things, in order:

A marriage license, issued by the county clerk in the county where the ceremony will take place.
Solemnization by someone the statute authorizes to perform marriages.
Registration of the completed marriage certificate with the county clerk within 10 days of the ceremony.

There is no blood test, no witness, and no required script.¹

Who Can Perform the Ceremony

The person who marries you is the one the state cares about. Illinois authorizes:

Any judge of a court of record, retired judges in good standing, and judges of the Court of Claims.
County clerks in counties with populations of 2,000,000 or more (essentially Cook County).
Mayors and village presidents in office on the date of the ceremony.
Public officials whose office already includes the power to solemnize marriages.
Clergy or ministers in good standing with their denomination.
Tribal leaders, in accordance with the prescriptions of an Indian Nation, Tribe, or Native Group.

Religious organizations cannot be compelled to perform a marriage that conflicts with their beliefs, and a refusal is not grounds for a lawsuit or penalty.¹

Illinois does not specifically ban online ordinations. A friend ordained through the Universal Life Church, American Marriage Ministries, or a similar body generally qualifies, provided the ordaining organization treats them as a current member in good standing. If you plan to go that route, call the county clerk’s office where you will apply for the license and confirm they will accept it.

Religious Ceremonies With No Single Officiant

Some traditions do not use a single person to pronounce the couple married. Quaker meetings, for example, have the couple marry each other before the congregation. Illinois accommodates this directly. The statute allows marriages “in accordance with the prescriptions of any religious denomination,” and specifies that an officiant must be in good standing only “when such prescriptions require an officiant.” When they do not, the marriage is still valid.

In those ceremonies, both parties take on the paperwork themselves. The couple is responsible for completing the marriage certificate and returning it to the county clerk within 10 days.¹

Who Signs the Marriage Certificate

This is where readers sometimes expect a witness line. In Illinois, the officiant signs the certificate and files it with the county clerk’s office within 10 days of the ceremony. There is no signature required from a witness. In ceremonies without a single officiant, both spouses sign and file.

Registration is what gets your marriage into the official record. A late filing by the officiant does not invalidate the marriage itself, because the legal union was created at the ceremony. It can, however, delay the certified copies you will need to change your name, update insurance, or add a spouse to benefits.¹

The Rest of the Timeline

Both of you must appear in person at the county clerk’s office in the county where you plan to marry. You cannot apply by mail, and the license is only good for a ceremony in that same county. Bring valid photo ID (driver’s license, state ID, or passport), your Social Security numbers, your dates of birth, and information about your parents, including their full names and birthplaces. If either of you was previously married, you will need the date the prior marriage ended.²³

Fees vary by county. Cook County charges $60, Peoria County charges $75, and Rock Island County charges $35. Call the specific clerk’s office to confirm the fee and the accepted payment methods, since some are cash-only.³

Illinois has a one-day waiting period between license issuance and the ceremony. Pick up the license on Thursday, and the earliest you can marry is Friday. It is a calendar-day rule, not a 24-hour clock. A judge can waive it for sufficient cause on petition. Once issued, the license is valid for 60 days. Miss that window, and you have to apply and pay again.⁴²

Beyond those items, nothing else is required by the state. If the two of you want to marry with no one else present but the officiant, you can.

1
Illinois General Assembly. Illinois Compiled Statutes 750 ILCS 5/209 – Solemnization and Registration
2
Rock Island County, IL. Marriage Licenses
3
Cook County, IL. Marriage Licenses
4
LaSalle County. Marriage License Information