Jarvis has a son who she raised as a single parent since he was aged 18 months.<ref>{{Cite web |date=8 September 2020 |title=I lost my job in the last recession. I know how difficult it will be for single parents this time |url=https://www.independent.co.uk/voices/coronavirus-recession-unemployment-parents-government-benefits-b404950.html |access-date=5 August 2024 |website=The Independent |language=en}}</ref> She lives outsidein the Eastleighborough constituency,of in Hamble Valley, where she is also a councillor.<ref>{{Cite web |date=7 September 2024 |title=Eastleigh’s new MP bungles maiden speech with Paralympic blunder |url=https://www.eastleighnews.co.uk/2024/09/eastleighs-new-mp-bungles-maiden-speech-with-paralympic-blunder/ |access-date=14 September 2024 |website=Eastleigh News |language=en}}</ref> <ref>{{Cite web |date=14 September 2024|title=Councillor Liz Jarvis |url=https://meetings.eastleigh.gov.uk/mgUserInfo.aspx?UID=50000739 |access-date=14 September 2024 |website=Eastleigh Borough Council|language=en}}</ref> From 2019 to 2023 she was a trustee of [[Home-Start Worldwide|Home-Start]] Westminster, a charity supporting families in London.<ref name=Linkedin /><ref>{{cite web |title=Our Trustees |url=https://web.archive.org/https://www.homestartwestminster.org.uk/about-us/our-trustees/ |website= |publisher=Home-Start Westminster |access-date=6 August 2024 |archive-url=https://web.archive.org/web/20220120163210/https://www.homestartwestminster.org.uk/about-us/our-trustees/ |archive-date=20 January 2022 |date= |url-status=unfit}}</ref>
