Welcome to

St. Mary Immaculate Parish

A Roman Catholic Parish in the Diocese of Joliet

15629 S. Rt. 59, Plainfield, IL 60544     815.436.2651





Enroll Today for SMI Parish School!

Register for the Fall Today!

We are still enrolling for the 2015-2016 school year. We offer a quality faith-centered education for children from Pre-School (age 3 by September 1, 2015) to Grade Eight and have openings in K thru 5 and 7th grade.  In order to register for our school or to be placed on the waiting list (PS/PK and 6th grade), we require that families be registered parishioners at St. Mary Immaculate. We also ask that you bring your child’s birth certificate and a Catholic baptismal certificate along with a $125 registration fee per family with you when you register. The first tuition payment for the fall is also due at this time. For more info, please visit our website at smischool.org or contact the school office at 815-436-3953. Thank you for your interest in St. Mary Immaculate Parish School. 

SMI Outing to
Joliet Slammers 


Tickets Available NOW!
Friday, July 10
Game starts at 7:05 pm

SMI Parish & School are sponsoring an “Evening at the Ball Field with Family and Friends”. Mark your calendars for Friday, July 10. The game starts at 7:05 pm versus the Southern Illinois Miners. There’s plenty of free parkingclose to the stadium, lots of tasty “Ball Park” food at family friendly prices and
fireworks after the game.  Tickets are available in the Commons for only $5.00 per person (half-price) for this exciting 
and fun night out.  You can buy tickets after weekend Masses on June 13 & 14 and June 27 & 28 or during the week from the Commons Receptionist, after June 1.

We currently have 100 tickets available in an SMI section, right behind home plate. We need you to...READ MORE

Totus Tuus is
Coming to SMI



July 19-24, 2015

Totus Tuus is a diocesan summer youth program for where seminarians and college students visit a parish for a week of proclaiming the Gospel through teachings, Mass, games, Confession, fun, personal witness stories, skits and more!

Entering Grades 1-6
Monday - Friday (July 20-24) 9:00 a.m. - 2:30 p.m.
Cost is $25 per child
Family Rate: $50 for 3 or more for children in Grades 1-6

Entering Grades 7-12
Sunday - Thurs. (July 19-23)
7:00 p.m. - 9:00 p.m.
Cost is $10 per teen  

For more info, please contact
Ruth Campbell at Rcampbell@smip.org or call 815-436-2651 ext. 877.

Click HERE to View/Download 
Registration Forms.



Download the NEW SMI Parish App!

SMI is excited to announce that we have released our brand new Parish App. It has a number of wonderful features to help keep you connected and up-to-date as well as plenty of resources to deepen your journey of faith. It is available for download today in the Apple, Google, Windows, and Amazon App Store. Just search for St. Mary Immaculate or SMIP in your App Store and download it today!


Catholic Ministries Annual Appeal 2015

Thank you to all the 974 families who have made a pledge to the Catholic Ministries Annual Appeal. Acknowledgement letters from the Diocese should arrive within the next week or two. Thank you also to those of you continuing to make your monthly pledge payments. If you have not yet made a pledge, please prayerfully consider how you might support the good works of our Bishop and our Diocese and send in your pledge this week. Pledge envelopes...READ MORE


Mark your Calendars - St. Mary Immaculate is Hosting a Carnival!

St. Mary Immaculate’s first-ever Carnival will be held August 26-29, 2015, right here on our parish grounds. We have contracted with All Around Amusement, Inc., a local company from Lockport, to provide a four-day Carnival for our parishioners and the local community. Details will follow in the weeks prior to the Carnival. In the meantime, please mark your calendars and plan to join us for what promises to be a fun-filled end-of-summer event here at our parish!







  Connect with 
  our Parish! 



  Click here for the

full Parish Calendar


Masses Times

4:00 pm
7:30 am
9:00 am
9:01 am (Cana Hall)
10:45 am

12:15 pm
6:00 pm (Contemporary Mass)

5:30 pm (Church)
12:15 pm (Cana Hall)

10:30 am (Cana Hall)


7:30 am


2:00-4:00 pm (Church)
8:30-10:00 am 

4:00-5:15 pm (North Wing Room A)


10:00 am (Faith Sharing Room)

(Or by appointment with the priests. To make an appointment contact the Parish Office at 815.436.2651)



Continuous exposition of the Most Blessed Sacrament from Sunday 7:00 pm through Friday 9:00 pm except on First Fridays when exposition continues overnight to Saturday 7:00 am.