(750 ILCS 75/55)
The proceedings shall be had in the county where the petitioner or respondent resides or where the parties' certificate of civil union was issued, except as otherwise provided herein, but process may be directed to any county in the State. Objection to venue is barred if not made within such time as the respondent's response is due. In no event shall venue be deemed jurisdictional.
(Source: P.A. 96-1513, eff. 6-1-11