| Gustaf Lantz | |
| Office1: | Member of the Riksdag |
| Constituency1: | Uppsala County |
| Term Start1: | 26 September 2022 |
| Birth Name: | Lars Gustaf Oscar Lantz |
| Party: | Social Democratic Party |
Lars Gustaf Oscar Lantz (born 1981) is a Swedish politician and member of the Riksdag, the national legislature. A member of the Social Democratic Party, he has represented Uppsala County since September 2022.[1] He had previously been a substitute member of the Riksdag for Ardalan Shekarabi three times: April 2017 to December 2017; September 2018 to August 2020; and December 2020 to September 2022.[1]