Courtyard by Marriott Chicago Downtown/Magnificent Mile

165 East Ontario Street, Chicago, Illinois
3,666
Sq ft event space
16
Meeting rooms
290
MAX Capacity
306
Guest rooms

Courtyard by Marriott Chicago Downtown/Magnificent Mile is a premier event destination offering world-class facilities for weddings, corporate events, conferences, galas, and social gatherings. With 3666 sq ft of flexible event space across 16 configurable rooms, we bring your vision to life with an experienced in-house events team.

Our dedicated coordinators, award-winning catering team, and state-of-the-art audio-visual capabilities ensure every detail is flawless — from the first site visit to the final dance.

Guest rooms

306 rooms available for individual stays and discounted room blocks.

CITY

CITY

DCTY

DCTY

DDLX

DDLX

DKNG

DKNG

Meeting & event space

3666 sq ft across 16 configurable rooms. Tap a room for capacities and setups.

Ontario Ballroom

2618 · 34 x 77 ft · 10 ft ceiling
Max capacity290
Floor area2618
Dimensions34 x 77 ft
Ceiling height10 ft
Configurations5
Capacity by setup
290
Theater
210
Banquet
174
Classroom
63
U-Shape
250
Reception

Ontario A & B

1870 · 34 x 55 ft · 10 ft ceiling
Max capacity205
Floor area1870
Dimensions34 x 55 ft
Ceiling height10 ft
Configurations5
Capacity by setup
205
Theater
150
Banquet
130
Classroom
50
U-Shape
200
Reception

Ontario B & C

1632 · 34 x 48 ft · 10 ft ceiling
Max capacity175
Floor area1632
Dimensions34 x 48 ft
Ceiling height10 ft
Configurations5
Capacity by setup
175
Theater
120
Banquet
110
Classroom
46
U-Shape
165
Reception

Ontario A

986 · 34 x 29 ft · 10 ft ceiling
Max capacity105
Floor area986
Dimensions34 x 29 ft
Ceiling height10 ft
Configurations5
Capacity by setup
105
Theater
80
Banquet
64
Classroom
30
U-Shape
99
Reception

Ontario B

884 · 34 x 26 ft · 10 ft ceiling
Max capacity90
Floor area884
Dimensions34 x 26 ft
Ceiling height10 ft
Configurations5
Capacity by setup
90
Theater
70
Banquet
56
Classroom
25
U-Shape
89
Reception

Ontario C

748 · 34 x 22 ft · 10 ft ceiling
Max capacity83
Floor area748
Dimensions34 x 22 ft
Ceiling height10 ft
Configurations5
Capacity by setup
83
Theater
60
Banquet
50
Classroom
20
U-Shape
79
Reception

Michigan

432 · 18 x 24 ft · 10 ft ceiling
Max capacity48
Floor area432
Dimensions18 x 24 ft
Ceiling height10 ft
Configurations5
Capacity by setup
48
Theater
30
Banquet
25
Classroom
15
U-Shape
40
Reception

Chicago Boardroom

308 · 14 x 22 ft · 10 ft ceiling
Max capacity0
Floor area308
Dimensions14 x 22 ft
Ceiling height10 ft
Configurations0
Capacity by setup

St. Clair

308 · 22 x 14 ft · 10 ft ceiling
Max capacity0
Floor area308
Dimensions22 x 14 ft
Ceiling height10 ft
Configurations0
Capacity by setup

Key amenities

Everything available on-site for your event and guests.

Interactive Map

  • Check cashing policy
  • Complimentary coffee in lobby
  • Complimentary newspaper in lobby
  • Hairdresser/barber
  • Video checkout

Other Hotel Service

  • ATM/Cash machine
  • Accessible parking
  • Complimentary in-room coffee or tea
  • Concierge desk
  • Indoor parking
  • Motorcycle parking
  • On-Site parking
  • Parking fee managed by hotel
  • Technical concierge
  • Valet parking

Recreational facilities

  • American Girl Place
  • Casino
  • Chicago Children's Museum
  • Childrens Pool Indoor
  • Cog Hill Golf & Country Club
  • Course Total Yardage
  • Crane's Landing at Marriott Lincolnshire Resort
  • Elizabeth Arden Red Door Spa
  • Equipment Available in Fitness Center
  • Exercise Room
  • Featured
  • Fitness Service
  • Game room
  • Harbourside International
  • Highland Park Country Club
  • Indoor Pool
  • Kiva Salon at Macy's Water Tower
  • LA Fitness
  • List All Special Guest Priviledges Available at Fitness Center
  • Maxine

Location & transportation

165 East Ontario Street, Chicago, Illinois

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