Hyatt Regency O'Hare Chicago — Event Spaces, Floor Plans & Capacities

9300 W Bryn Mawr Ave, Rosemont, IL 60018

80 rooms · largest space: Grand Ballroom AB, 30,545 sq ft2,838 m²

Hyatt Regency O'Hare Chicago gives Rosemont event planners 80 rooms to work with. The largest space is Grand Ballroom AB, 30,545 sq ft2,838 m² (divisible into 9 sections). It holds up to 675 guests. Review the layouts and seating capacities below, then test your setup in 3D — free.

Plan an event in Grand Ballroom: open a free to-scale layout seating 2,090 at round tables in its 134 × 227 ft footprint at floors.live/start — no account needed.

Across its 80 rooms, Hyatt Regency O'Hare Chicago handles theater-style sessions for up to 2,600, seated banquets for 4,000 and standing receptions for 350. 12 smaller rooms suit breakouts and board meetings. Exact figures for every room and setup style are in the chart below.

Plan your event in this space — free

Unverified listing — compiled from Hyatt Regency O'Hare Chicago’s published information. Venue staff can verify capacities and setups free: floors.live/venues/us/illinois/rosemont/hyatt-regency-o-hare-chicago/?claim=1.

Floor plans

Detailed floor plans for Hyatt Regency O'Hare Chicago are published on the venue’s official site.

View official floor plans at Hyatt ↗Plan your event in this space — free

Work at Hyatt Regency O'Hare Chicago? to publish your official floor plans and 360° tours here — free.

Room capacities & dimensions

80 rooms, 103 configurations. Combined and divided set-ups are listed under their room.

Room capacities and dimensions for Hyatt Regency O'Hare Chicago
SpaceCeiling
BarajasPlan this room →672 sq ft62 m²8.5 ft2.6 m40603040241618
CapitalPlan this room →672 sq ft62 m²8.5 ft2.6 m40603040241618
Charles De GaullePlan this room →696 sq ft65 m²8.5 ft2.6 m40603040241618
Conference CenterPlan this room →832 sq ft77 m²15 ft4.6 m6010040125202530
D.F.WPlan this room →2,080 sq ft193 m²9.5 ft2.9 m12014090150463442
D.F.W. APlan this room →2,080 sq ft193 m²9.5 ft2.9 m60603675281624
D.F.W. BPlan this room →2,080 sq ft193 m²9.5 ft2.9 m60603675281624
DaVinci APlan this room →784 sq ft73 m²8.5 ft2.6 m40603050241618
1 configuration with DaVinci A
Combined and divided set-ups that include DaVinci A
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceBoardroomU-Shape
Davinci ABPlan this room →1,596 sq ft148 m²8.5 ft2.6 m801206410040—36
DaVinci BPlan this room →784 sq ft73 m²8.5 ft2.6 m40603050241618
Directors APlan this room →——10129—8——
1 configuration with Directors A
Combined and divided set-ups that include Directors A
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceBoardroomU-Shape
Directors ABCPlan this room →——60———15——
Directors BPlan this room →——302015—12——
Directors CPlan this room →——10126—8——
DullesPlan this room →621 sq ft58 m²9.6 ft2.9 m40503250241620
Entry Level FoyerPlan this room →——250——————
FlorencePlan this room →1,218 sq ft113 m²8.5 ft2.6 m8012072100462840
GatwickPlan this room →780 sq ft72 m²8.5 ft2.6 m40603040241618
Grand BallroomPlan this room →—23 ft7 m4,0002,6001,500————
11 configurations with Grand Ballroom
Combined and divided set-ups that include Grand Ballroom
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceBoardroomU-Shape
Grand ABCPlan this room →—25 ft7.6 m348660540————
Grand ABCDPlan this room →—23 ft7 m5501,300750————
Grand ABCDEPlan this room →—23 ft7 m6481,340990————
Grand Ballroom ABPlan this room →30,545 sq ft2,838 m²23 ft7 m675480325————
Grand Ballroom FGHPlan this room →—23 ft7 m1,200700480————
Grand DEPlan this room →—23 ft7 m360680440————
Grand DEFGHPlan this room →—23 ft7 m6481,340990————
Grand EFGHPlan this room →—23 ft7 m5501,300750————
Grand Ballroom BCPlan this room →30,545 sq ft2,838 m²23 ft7 m———————
Grand Ballroom FGPlan this room →30,545 sq ft2,838 m²23 ft7 m———————
Grand Ballroom GHPlan this room →30,545 sq ft2,838 m²23 ft7 m———————
Grand Ballroom APlan this room →2,835 sq ft263 m²23 ft7 m18018017030060—48
Grand Ballroom BPlan this room →2,745 sq ft255 m²23 ft7 m18018017030060—48
Grand Ballroom CPlan this room →2,745 sq ft255 m²23 ft7 m18018017030060—48
Grand Ballroom DPlan this room →30,545 sq ft2,838 m²23 ft7 m900350240————
Grand Ballroom EPlan this room →30,545 sq ft2,838 m²23 ft7 m900350240————
Grand Ballroom FPlan this room →2,835 sq ft263 m²23 ft7 m18018017030060—48
Grand Ballroom FoyerPlan this room →30,545 sq ft2,838 m²23 ft7 m230——————
Grand Ballroom GPlan this room →2,835 sq ft263 m²23 ft7 m18018017030060—48
Grand Ballroom HPlan this room →2,835 sq ft263 m²23 ft7 m18018017030060—48
Grand BoardroomPlan this room →—10 ft3 m10129—10——
Grand Office APlan this room →——20———16——
1 configuration with Grand Office A
Combined and divided set-ups that include Grand Office A
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceBoardroomU-Shape
Grand Office A&BPlan this room →——20———16——
Grand Office BPlan this room →——20———16——
Grand RegistrationPlan this room →——20———16——
HartsfieldPlan this room →1,508 sq ft140 m²9.6 ft2.9 m8012072130403236
Heathrow APlan this room →784 sq ft73 m²8.5 ft2.6 m40603050241618
1 configuration with Heathrow A
Combined and divided set-ups that include Heathrow A
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceBoardroomU-Shape
Heathrow ABPlan this room →1,596 sq ft148 m²8.5 ft2.6 m801206410040—36
Heathrow BPlan this room →784 sq ft73 m²8.5 ft2.6 m40603050241618
International APlan this room →1,560 sq ft145 m²8.5 ft2.6 m7010072150462040
2 configurations with International A
Combined and divided set-ups that include International A
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceBoardroomU-Shape
International ABCPlan this room →—8.5 ft2.6 m450250200————
International DEFPlan this room →—8.5 ft2.6 m400250180————
International BPlan this room →1,680 sq ft156 m²8.5 ft2.6 m8013090200502044
International BallroomPlan this room →—8.5 ft2.6 m1,200600400————
International CPlan this room →1,400 sq ft130 m²8.5 ft2.6 m7011072150402034
International DPlan this room →1,092 sq ft101 m²8.5 ft2.6 m40605880281624
International EPlan this room →1,568 sq ft146 m²8.5 ft2.6 m8013090175482042
International FPlan this room →1,456 sq ft135 m²8.5 ft2.6 m6011072175402034
J.F.KPlan this room →756 sq ft70 m²9.6 ft2.9 m40503260281824
John WaynePlan this room →832 sq ft77 m²9.5 ft2.9 m506036125301626
L.A.X.Plan this room →2,080 sq ft193 m²9.5 ft2.9 m12014090150463442
L.A.X. APlan this room →2,080 sq ft193 m²9.5 ft2.9 m60603675283624
L.A.X. BPlan this room →2,080 sq ft193 m²9.5 ft2.9 m60603675281624
La GuardiaPlan this room →756 sq ft70 m²9.6 ft2.9 m40503260281824
LambertPlan this room →832 sq ft77 m²9.5 ft2.9 m506036125301626
LibertyPlan this room →756 sq ft70 m²9.6 ft2.9 m40503260281824
LindberghPlan this room →832 sq ft77 m²9.5 ft2.9 m506036125301626
LoganPlan this room →621 sq ft58 m²9.6 ft2.9 m40503650241620
LondonPlan this room →1,680 sq ft156 m²8.5 ft2.6 m10014090160523048
MalpensaPlan this room →1,176 sq ft109 m²8.5 ft2.6 m6090388036—30
McCarranPlan this room →832 sq ft77 m²9.5 ft2.9 m506036125301626
MidwayPlan this room →1,508 sq ft140 m²9.6 ft2.9 m8010070130403236
MirabelPlan this room →672 sq ft62 m²8.5 ft2.6 m40603040241618
Narita APlan this room →784 sq ft73 m²8.5 ft2.6 m40603050241618
1 configuration with Narita A
Combined and divided set-ups that include Narita A
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceBoardroomU-Shape
Narita ABPlan this room →1,596 sq ft148 m²8.5 ft2.6 m801206410040—36
Narita BPlan this room →784 sq ft73 m²8.5 ft2.6 m40603050241618
North CentralPlan this room →840 sq ft78 m²9 ft2.7 m40603060241618
O' Hare BallroomPlan this room →—9.6 ft2.9 m220220120————
2 configurations with O' Hare Ballroom
Combined and divided set-ups that include O' Hare Ballroom
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceBoardroomU-Shape
O'Hare Ballroom ABPlan this room →2,250 sq ft209 m²9.6 ft2.9 m———————
O'Hare Ballroom BCPlan this room →2,250 sq ft209 m²9.6 ft2.9 m———————
O'H Private Dining RoomPlan this room →——50——————
O'Hare Ballroom APlan this room →570 sq ft53 m²9.6 ft2.9 m40604060241620
O'Hare Ballroom BPlan this room →930 sq ft86 m²9.6 ft2.9 m608050100342028
O'Hare Ballroom CPlan this room →750 sq ft70 m²9.6 ft2.9 m50703680301824
ParisPlan this room →1,288 sq ft120 m²8 ft2.4 m8012078130462840
Red BarPlan this room →——250——————
Ronald ReaganPlan this room →756 sq ft70 m²9.6 ft2.9 m40503260281624
Rosemont BallroomPlan this room →—18.4 ft5.6 m140160120250——54
2 configurations with Rosemont Ballroom
Combined and divided set-ups that include Rosemont Ballroom
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceBoardroomU-Shape
Rosemont Ballroom ABPlan this room →—18.5 ft5.6 m675460300————
Rosemont Ballroom CDPlan this room →—18.5 ft5.6 m575350230————
Rosemont Ballroom APlan this room →2,280 sq ft212 m²18.5 ft5.6 m14016012025062—54
Rosemont Ballroom BPlan this room →2,520 sq ft234 m²18.5 ft5.6 m16022015035070—60
Rosemont Ballroom CPlan this room →1,880 sq ft175 m²18.5 ft5.6 m15017010030058—48
Rosemont Ballroom ComplexPlan this room →——2,500—500————
Rosemont Ballroom DPlan this room →1,640 sq ft152 m²18.5 ft5.6 m1201509020050—40
SeatacPlan this room →832 sq ft77 m²9.5 ft2.9 m506036125301626
Sky HarborPlan this room →832 sq ft77 m²9.5 ft2.9 m506036125301626
Tech CenterPlan this room →—8.5 ft2.6 m——40————
TegelPlan this room →667 sq ft62 m²8.5 ft2.6 m40603040241618
United APlan this room →1,664 sq ft155 m²9 ft2.7 m8010060120402430
1 configuration with United A
Combined and divided set-ups that include United A
ConfigurationSq ft / m²CeilingBanquetTheaterClassroomReceptionConferenceBoardroomU-Shape
United ABPlan this room →—9 ft2.7 m300180120————
United BPlan this room →1,664 sq ft155 m²9 ft2.7 m10013580180482436
VentanasPlan this room →——200——————
ViennaPlan this room →1,334 sq ft124 m²8.5 ft2.6 m8018072130462840

Figures from published venue data; blank cells mean the venue hasn’t published that number. Verify final counts with the venue.

Sizing another room? Try the event room capacity calculator or the floor plan scale converter.

Frequently asked questions

What is the floor plan of Hyatt Regency O'Hare Chicago?

Hyatt Regency O'Hare Chicago has 80 rooms. The largest space is Grand Ballroom AB, 30,545 sq ft (134 × 227 ft). Every room's dimensions and seating capacity by setup are listed on this page. For the venue's own drawings, see its official website, linked from this page.

How many event rooms does Hyatt Regency O'Hare Chicago have?

Hyatt Regency O'Hare Chicago has 80 rooms. 103 configurations are listed on this page.

What is the largest space at Hyatt Regency O'Hare Chicago?

Grand Ballroom AB, 30,545 sq ft (divisible into 9 sections): 134 × 227 ft, 675 banquet / 480 theater.

How many people can Hyatt Regency O'Hare Chicago seat for a banquet?

Up to 4,000 in Grand Ballroom. The next largest room, Rosemont Ballroom Complex, seats 2,500.

Can Grand Ballroom AB be divided?

Yes. Grand Ballroom AB divides into 9 sections: Grand Ballroom, Grand Ballroom A, Grand Ballroom B, Grand Ballroom C, Grand Ballroom D, Grand Ballroom E, Grand Ballroom F, Grand Ballroom G, Grand Ballroom H.

What is the ceiling height at Hyatt Regency O'Hare Chicago?

The highest ceiling is 23 ft, in Grand Ballroom.

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