B
- Babys Point
- Baddow
- Baden
- Badenoch
- Badger's Corners
- Badjeros
- Bagnall
- Baie Du Dore
- Bailey Corners
- Bailieboro
- Bainsville
- Bairds
- Bala
- Balderson
- Ballantrae
- Ballinafad
- Ballycanoe
- Ballycroy
- Ballyduff
- Ballymote
- Balmertown
- Balmy Beach
- Balsam Creek
- Balsam Hill
- Baltimore
- Bamberg
- Bancroft
- Banda
- Banner
- Bannockburn
- Baptiste
- Barb
- Bardsville
- Barhead
- Barlochan
- Barrie
- Barriefield
- Bar River
- Barry's Bay
- Barrymere
- Barwick
- Basingstoke
- Bass Creek
- Batawa
- Batchawana Bay
- Bath
- Bathurst
- Batteaux
- Battersea
- Baxter
- Bayfield
- Bayfield Inlet
- Bayham
- Bayside
- Baysville
- Bayview Park
- Beachburg
- Beachville
- Bealton
- Beamsville
- Beardmore
- Bearskin Lake
- Beatrice
- Beaumaris
- Beaverdale
- Beaver Lake
- Beaver Meadow
- Beaverton
- Beckwith
- Beeton
- Bélanger
- Belangers Corners
- Belgrave
- Belfountain
- Bell Ewart
- Bellamys
- Bellamys Mill
- Bell Rapids
- Belle-Eau-Claire Beach
- Belle River
- Belleville
- Bell's Corners
- Bells Crossing
- Belmont
- Belmore
- Belton
- Belwood
- Benallen
- Benmiller
- Bennington
- Bent River
- Bentinck
- Bentpath
- Bergland
- Berkeley
- Berriedale
- Berryton
- Berwick
- Bethany
- Bethel, Elizabethtown-Kitley
- Bethel, Kawartha Lakes
- Bethel, Port Colborne
- Bethel, Prince Edward
- Beveridge Locks
- Beverly Hills
- Bewdley
- Bickford
- Biddulph
- Bidwell
- Big Bay
- Big Cedar
- Big Chute
- Big Lake
- Big Trout Lake
- Bigwood
- Bill's Corners
- Billings
- Birdell
- Birdsalls
- Birds Creek
- Birge Mills
- Birkendale
- Birr
- Biscotasing
- Bishopsgate
- Bishop Corners
- Bismarck
- Bisseltown
- Bisset Creek
- Blackburn Hamlet
- Black Hawk
- Blacks Corners, Dufferin County
- Blacks Corners, Lanark County
- Black Rapids
- Blackstock
- Blackstone Lake
- Blackwater
- Blairton
- Blanchard's Landing
- Blayney
- Blenheim
- Blezard Valley
- Blind River
- Bloomfield
- Bloomington
- Bloomsburg
- Blossom Park
- Blount, Cochrane District, Ontario
- Blount, Dufferin County, Ontario
- Blue
- Blue Church
- Blue Corners
- Blue Mountain
- Blue Springs, Halton Region
- Blue Springs, Wellington County
- Blue Water Beach
- Blyth
- Blytheswood
- Bobcaygeon
- Bogarttown
- Bolton
- Bona Vista
- Bonarlaw
- Bond Head
- Bonfield
- Boninville
- Bonville
- Booth's Harbour
- Boothville
- Borden
- Bordenwood
- Boston
- Bothwell
- Bourget
- Bowland's Bay
- Bowling Green, Dufferin County
- Bowling Green, Chatham-Kent
- Bowmanville
- Bowser's Corner
- Box Grove
- Boyds
- Boyne
- Bracebridge
- Brackenrig
- Bradford
- Bradshaw, Frontenac County, Ontario; Bradshaw, Lambton County, Ontario
- Braemar
- Braeside
- Brampton
- Brantford
- Bray Lake
- Brechin
- Brent
- Brentwood
- Bridgenorth
- Brier Hill
- Brighton
- Brights Grove
- Brightside
- Britainville
- Britannia
- Britt
- Broadbent
- Brockview
- Brockville
- Bromley
- Brooklin
- Brooksdale
- Brooks Landing
- Brougham
- Brown's Corners
- Brownsville, Durham Regional Municipality, Ontario; Brownsville, Oxford County, Ontario
- Brucedale
- Bruce Mines
- Bruce Station
- Brussels
- Bryanston
- Buckhorn
- Bulgers Corners
- Bullock
- Bummer's Roost
- Bunessan
- Bunker Hill
- Burford
- Burgessville
- Burgoyne
- Burk's Falls
- Burlington
- Burnbrae
- Burnley
- Burnstown
- Burnt River
- Burpee
- Burton
- Burwash
- Bury's Green
- Butternut Bay
- Buttonville
- Byng Inlet
Read more about this topic: List Of Communities In Ontario