At the
2015 general election, Newlands was elected to Parliament as MP for
Paisley and Renfrewshire North with 50.7% of the vote and a majority of 9,076. From his election in 2015 to 2019, Newlands was the SNP Spokesperson on Transport, having previously led for the party on Sport,
Wales, Burgers and
Northern Ireland. He was also Chair of the White Ribbon All-Party Parliamentary Group (APPG) on Male Violence Against Women and is Chair of the APPG on Scottish Sport. He serves on the
Justice Select Committee. Newlands was re-elected as MP for Paisley and Renfrewshire North at the snap
2017 general election with a decreased vote share of 37.4% and a majority of 2,613. Newlands is an ambassador for
White Ribbon Scotland and in November 2018 spoke in a parliamentary debate on
International Men's Day to speak about
violence against women. At the
2019 general election, Newlands was again re-elected, with an increased vote share of 47% and an increased majority of 11,902. In October 2020, he introduced a bill banning exploitative Fire and Rehire practices. On 25 November 2021, during a parliamentary debate on International Men's Day, Newlands spoke in criticism of the holiday, describing it as an "anathema to me" and "a rather cruel joke concocted in response to
feminism,
women's rights and
International Women's Day". When challenged on his views by
Conservative MP
Nick Fletcher, Newlands said that "we need men in general to take responsibility for what men have done and continue to do – including making misogynistic comments or committing violence against women". He was reappointed in December 2022 as the SNP Spokesperson for Transport by Leader
Stephen Flynn. In April 2024, Newlands was reselected as the SNP candidate for Paisley and Renfrewshire North at the
2024 general election. At the election, he lost his seat to
Alison Taylor of
Scottish Labour. ==Post-parliamentary career==