Members By family name - B
- Babarinde, Josh
- Bacon, Gareth
- Bacon, Richard
- Badenoch, Kemi
- Bagshawe, Louise
- Bailey, Adrian
- Bailey, Calvin
- Bailey, Olivia
- Bailey, Shaun
- Baillie, Siobhan
- Bain, William
- Baines, David
- Baker, Alex
- Baker, Duncan
- Baker, Norman
- Baker, Richard
- Baker, Steve
- Baldry, Tony
- Baldwin, Harriett
- Ballinger, Alex
- Balls, Ed
- Bance, Antonia
- Banks, Gordon
- Barclay, Stephen
- Bardell, Hannah
- Barker, Gregory
- Barker, Paula
- Baron, John
- Barron, Kevin
- Barron, Lee
- Barros-Curtis, Alex
- Barwell, Gavin
- Baxter, Johanna
- Bayley, Hugh
- Baynes, Simon
- Beales, Danny
- Beavers, Lorraine
- Bebb, Guto
- Beckett, Margaret
- Bedford, Peter
- Begg, Anne
- Begley, Órfhlaith
- Begum, Apsana
- Beith, Alan
- Bell, Aaron
- Bell, Stuart
- Bell, Torsten
- Bellingham, Henry
- Benn, Hilary
- Bennett, Alison
- Benton, Joe
- Benton, Scott
- Benyon, Richard
- Bercow, John
- Beresford, Paul
- Berger, Luciana
- Berry, Jake
- Berry, James
- Berry, Siân
- Betts, Clive
- Bhatti, Saqib
- Billington, Polly
- Bingham, Andrew
- Binley, Brian
- Birtwistle, Gordon
- Bishop, Matt
- Black, Mhairi
- Blackford, Ian
- Blackman, Bob
- Blackman, Kirsty
- Blackman-Woods, Roberta
- Blackwood, Nicola
- Blake, Olivia
- Blake, Rachel
- Blears, Hazel
- Blenkinsop, Tom
- Blomfield, Paul
- Bloore, Chris
- Blundell, Elsie
- Blunkett, David
- Blunt, Crispin
- Boles, Nick
- Bonavia, Kevin
- Bone, Peter
- Bonnar, Steven
- Bool, Sarah
- Borwick, Victoria
- Boswell, Phil
- Botterill, Jade
- Bottomley, Peter
- Bowie, Andrew
- Brabin, Tracy
- Brackenridge, Sureena
- Bradley, Ben
- Bradley, Karen
- Bradshaw, Ben
- Brady, Graham
- Brady, Mickey
- Brake, Tom
- Brandreth, Aphra
- Brash, Jonathan
- Bray, Angie
- Brazier, Julian
- Brennan, Kevin
- Brereton, Jack
- Brewer, Alex
- Brickell, Phil
- Bridgen, Andrew
- Brine, Steve
- Bristow, Paul
- Britcliffe, Sara
- Brock, Deidre
- Brokenshire, James
- Brooke, Annette
- Brown, Alan
- Brown, Gordon
- Brown, Lyn
- Brown, Nicholas
- Brown, Russell
- Browne, Anthony
- Browne, Jeremy
- Brown-Fuller, Jess
- Bruce, Fiona
- Bruce, Malcolm
- Bryant, Chris
- Buchan, Felicity
- Buck, Karen
- Buckland, Robert
- Buckley, Julia
- Burden, Richard
- Burghart, Alex
- Burgon, Richard
- Burke, Maureen
- Burley, Aidan
- Burnham, Andy
- Burns, Conor
- Burns, Simon
- Burrowes, David
- Burstow, Paul
- Burt, Alistair
- Burt, Lorely
- Burton-Sampson, David
- Butler, Dawn
- Butler, Rob
- Byles, Daniel
- Byrne, Ian
- Byrne, Liam