[[File:Theresa May 2017 election speech outside 10 Downing Street.jpg|thumb|May uden for [[10 Downing Street]], den 9. juni 2017, sammen med sin mand ]]
May har været gift med Philip May, en investeringsbankmand, der i øjeblikket er ansat af Capital International, siden den 6. september 1980; parret har ingen børn.<ref>{{cite news|url=https://www.theguardian.com/politics/2009/dec/14/theresa-may-lady-in-waiting|title=Theresa May: David Cameron's lady in waiting|last=Orr|first=Deborah|date=14. Decemberdecember 2009|work=The Guardian|accessdate=9. Junejuni 2011|deadurl=no|archiveurl=https://web.archive.org/web/20131107030719/http://www.theguardian.com/politics/2009/dec/14/theresa-may-lady-in-waiting|archivedate=7. Novembernovember 2013|df=dmy-all}}</ref> Det er almindeligt antaget, at den tidligere premierminister i Pakistan, [[Benazir Bhutto]], introducerede de to i deres tid i Oxford.<ref>{{cite web |url=http://www.bbc.com/news/36774270 |title=Profile: Theresa May's husband Philip |publisher=BBC News |date=13. Julyjuli 2016 |accessdate=20. Julyjuli 2016 |deadurl=no |archiveurl=https://web.archive.org/web/20160719022458/http://www.bbc.com/news/36774270 |archivedate=19. Julyjuli 2016 |df=dmy-all }}</ref> May har udtrykt beklagelse for, at hun og hendes mand ikke kunne få børn.<ref name="I was probably goody two-shoes:">{{cite web|title=I was probably goody two-shoes: Theresa May interviewed|url=http://www.telegraph.co.uk/news/politics/9762170/Theresa-May-interview-I-probably-was-Goody-Two-Shoes-at-school.html|work=[[The Daily Telegraph]]|accessdate=3. Julyjuli 2016|deadurl=no|archiveurl=https://web.archive.org/web/20160703135423/http://www.telegraph.co.uk/news/politics/9762170/Theresa-May-interview-I-probably-was-Goody-Two-Shoes-at-school.html|archivedate=3. Julyjuli 2016|df=dmy-all}}</ref> Parret er lidenskabelige vandrere, og de bruger regelmæssigt deres ferie i [[Schweiziske Alper|de schweiziske alper]].<ref>{{cite news|last1=Khomami|first1=Nadia|title=Theresa May seeks peace and quiet on Alpine walking holiday|url=https://www.theguardian.com/politics/2016/aug/12/theresa-may-seeks-peace-and-quiet-on-alpine-walking-holiday|accessdate=12. Augustaugust 2016|work=The Guardian|date=12. Augustaugust 2016|deadurl=no|archiveurl=https://web.archive.org/web/20160812204523/http://www.theguardian.com/politics/2016/aug/12/theresa-may-seeks-peace-and-quiet-on-alpine-walking-holiday|archivedate=12. Augustaugust 2016|df=dmy-all}}</ref> May er også en [[cricket]]fan, og hævder at [[Geoffrey Boycott]] var en af hendes sportslige helte.<ref>{{cite news|url=http://www.telegraph.co.uk/news/2016/08/27/prime-minister-theresa-may-spotted-watching-england-vs-pakistan/|title=Prime Minister Theresa May spotted watching England vs Pakistan at Lord's cricket ground with husband Philip|work=The Daily Telegraph|date=27. Augustaugust 2016|accessdate=5. Septemberseptember 2016|deadurl=no|archiveurl=https://web.archive.org/web/20160902121306/http://www.telegraph.co.uk/news/2016/08/27/prime-minister-theresa-may-spotted-watching-england-vs-pakistan/|archivedate=2. Septemberseptember 2016|df=dmy-all}}</ref> Hun kan også lide at lave mad og har sagt at hun ejer 100 kogebøger. Philip har sagt, at hun "er en meget god kok".<ref name="Stamp BBC 2016">{{cite web | last=Stamp | first=Gavin | title=Who is Theresa May: A profile of UK's new prime minister | website=BBC News | date=25. Julyjuli 2016 | url=http://www.bbc.co.uk/news/uk-politics-36660372 | access-date=29 May 2017 | deadurl=no | archiveurl=https://web.archive.org/web/20170516163755/http://www.bbc.co.uk/news/uk-politics-36660372 | archivedate=16. Maymaj 2017 | df=dmy-all }}</ref><ref name="The Straits Times 2017">{{cite web | title=Bins, cooking, the bedroom – Britain's Theresa May offers glimpse of private life | website=The Straits Times | date=10. Maymaj 2017 | url=http://www.straitstimes.com/world/europe/bins-cooking-the-bedroom-britains-theresa-may-offers-glimpse-of-private-life | access-date=29 May 2017 | deadurl=no | archiveurl=https://web.archive.org/web/20170529081708/http://www.straitstimes.com/world/europe/bins-cooking-the-bedroom-britains-theresa-may-offers-glimpse-of-private-life | archivedate=29. Maymaj 2017 | df=dmy-all }}</ref>
May er medlem af [[den engelske kirke]] og kommer jævnligt i kirke om søndagen.<ref>{{cite news |first=Andrew |last=Gimson |url=https://www.theguardian.com/theobserver/2012/oct/20/profile-theresa-may |title=Theresa May: minister with a mind of her own |work=The Observer |location=London |date=20. Octoberoktober 2012 |quote=May said: 'I am a practising member of the Church of England, a vicar's daughter.' |deadurl=no |archiveurl=https://web.archive.org/web/20170113024404/https://www.theguardian.com/theobserver/2012/oct/20/profile-theresa-may |archivedate=13. Januaryjanuar 2017 |df=dmy-all }}</ref><ref>{{cite news |first=Christopher |last=Howse |url=http://www.telegraph.co.uk/comment/11263458/Theresa-Mays-Desert-Island-hymn.html |title=Theresa May's Desert Island hymn |work=The Daily Telegraph |location=London |date=29. Novembernovember 2014 |quote=The Home Secretary declared that she was a 'regular communicant' in the Church of England |deadurl=no |archiveurl=https://web.archive.org/web/20150505190530/http://www.telegraph.co.uk/comment/11263458/Theresa-Mays-Desert-Island-hymn.html |archivedate=5. Maymaj 2015 |df=dmy-all }}</ref><ref>{{cite news|newspaper=The Times|title=Church of England and Theresa May| date=15. Marchmarts 2012|page=26}}</ref>] Som datter til en anglikansk præst, præsten Hubert Brasier, har May sagt, at hendes kristne tro "er en del af mig. Det er en del af, hvem jeg er og hvordan jeg nærmer mig ting".<ref>{{cite web|last=Bushfield|first=Antony|title=Theresa May: Christianity is 'part of me'|url=https://www.premier.org.uk/News/UK/Theresa-May-Christianity-is-part-of-me|website=Premier|accessdate=18. Julyjuli 2016|date=24. Novembernovember 2014|deadurl=no|archiveurl=https://web.archive.org/web/20160710072555/http://www.premier.org.uk/News/UK/Theresa-May-Christianity-is-part-of-me|archivedate=10. Julyjuli 2016|df=dmy-all}}</ref>
