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165 East Ontario Street, Chicago, Illinois 60611 USA
+1 312-573-0800
4.5 767 Reviews

Start planning your meeting or event here

Tell us about your event, then we’ll contact you and plan it together.

Get Started Here

Meetings and Events

  • 6

    Event Rooms

  • 3,666 sq ft

    Total Event Space

  • 290

    Capacity Largest Space

  • 6

    Maximum Breakout Rooms

VIEW FLOOR PLANS AND CAPACITY CHARTS

About This Venue

  • Refreshing event menus just right for you!

    Learn more

  • Impress your colleagues by hosting a successful meeting at our adaptable venues in downtown Chicago

  • Make sure your training seminar runs smoothly with the professional aid of our planning staff

  • Simplify your presentation experience when you rent our available AV equipment

  • Our Ontario Ballroom can accommodate up to 290 employees at your company event

  • Before visiting the Magnificent Mile, finish up work tasks at our 24-hour business center

Plan an Inspired Event

Image See What’s Possible
See What's Possible.

Search our event ideas online with inspiring event photos, tips and layouts - specific to this hotel.

Attendee Booking Tools

Image Attendee Booking Tools

We can provide you with a unique complimentary Reservation Link that makes it easy for your guests to reserve their rooms.

  • Shared in an email
  • Embed in a website
  • Personalized with your group name, event dates, hotel, and special rates
  • Displayed in multiple languages on Marriott domains worldwide

Manage Your Event with Ease

Image Manage Your Event with Ease
Keep Your Event in Hand.

Manage event details, make real-time requests and connect with our staff - from the palm of your hand.

Group Lists

If you have a list of your guests, we can make reservations for all of them.

We can send you a report showing which of your guests have reserved rooms and when they plan to arrive.

Mobile Check-In

Guests can check in before their stay, receive instant alerts when their room is ready and check out by skipping the front desk.

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Reward Yourself

Earn up to 50,000 plus Elite status, discounts and more.

Equipment and Services

Meeting Equipment

AV equipment

Film projector

LCD projector

Microphone

Overhead projector

Rear screen projection

Stage: portable

TV

TV production service provider

Video camera

Meeting Services

AV technician

Copy service

Decorator

Electrician

Laborer

Locksmith

Security guard

Videoconferencing

Business Equipment

Computers

Printers

Business Services

Copy service

Fax service

Fee for each additional page of outgoing fax

Full-service business center

Network/Internet printing

Overnight delivery/pickup

Post/parcel

High-speed Internet access

Meeting rooms:Wired,Wireless

Catering

Afternoon Break

Coffee Break

Dinner

Lunch

Reception

Capacity

Capacity Chart

Convert Meters | Reset
  • Chicago Boardroom
  • 14x22x10
  • 308
  • 14
  •  
  • 14
  •  
  •  
  •  
  • St. Clair
  • 22x14x10
  • 308
  • 10
  •  
  • 10
  •  
  •  
  •  
  • Michigan
  • 18x24x10
  • 432
  • 48
  • 25
  • 20
  • 15
  • 40
  • 30
  • Ontario C
  • 34x22x10
  • 748
  • 83
  • 50
  • 25
  • 20
  • 79
  • 60
  • Ontario B
  • 34x26x10
  • 884
  • 90
  • 56
  • 30
  • 25
  • 89
  • 70
  • Ontario A
  • 34x29x10
  • 986
  • 105
  • 64
  • 35
  • 30
  • 99
  • 80
  • Ontario B & C
  • 34x48x10
  • 1,632
  • 175
  • 110
  • 40
  • 46
  • 165
  • 120
  • Ontario A & B
  • 34x55x10
  • 1,870
  • 205
  • 130
  • 44
  • 50
  • 200
  • 150
  • Ontario Ballroom
  • 34x77x10
  • 2,618
  • 290
  • 174
  • 60
  • 63
  • 250
  • 210

Floor Plans

Meeting Room Floor Plans0

Room Set-Up Examples

Setup Example

Banquet

Generally used for meals and sessions involving small group discussions. A five foot round table seats eight people comfortably. A six foot round table seats 10 people comfortably.

Setup Example

Conference and Hollow Square

Appropriate for interactive discussions and note-taking sessions for fewer than 25 people. Many hotels have elegant "boardrooms" for 10 to 20 people, equipped with full audiovisual capabilities, a writing board, cork board and a flip chart.

Setup Example

Schoolroom or Classroom

The most desirable setup for medium to large-size lectures. Requires a relatively large room. Tables provide attendees with space for spreading out materials and taking notes.

Setup Example

E-shape, U-shape and T-shape

Appropriate for groups of fewer than 40 people. These are best for interaction with a leader seated at the head of the setup. Audiovisual is usually best set up at the open end of the seating.

Setup Example

Ovals and Rounds

Generally used for meals and sessions involving small group discussions. A five foot round table seats eight people comfortably. A six foot round table seats 10 people comfortably.

Setup Example

Reception

Stand-up social function where beverages and light foods are served. Foods may be presented on small buffet tables or passed by servers. May precede a meal function.

Setup Example

Theater

Appropriate for large sessions and short lectures that do not require extensive note-taking. This is a convenient setup to use before breaking into discussion or role-playing groups because chairs can be moved.

Check Room Rates & Availability

Courtyard® by Marriott® Chicago Downtown/Magnificent Mile