Great Coastal Railway Journeys is a BBC documentary series produced by Naked and presented by Michael Portillo, a former Conservative MP and Minister of State for Transport.Following the format of Great British Railway Journeys and related series with Portillo as presenter, each episode of this series features a coastal railway journey through England, Scotland, Wales or Ireland. Series 1 was aired on BBC Two in January–February 2022. Series 2 was aired on BBC Two in May–June 2023.

Portillo has also presented seven other programmes with a similar format: Great Continental Railway Journeys (7 series; 2012–2020), Great American Railroad Journeys (4 series; 2016–2020), Great Indian Railway Journeys (2018), Great Alaskan Railroad Journeys and Great Canadian Railway Journeys (broadcast consecutively in January 2019), Great Australian Railway Journeys (2019), Great Asian Railway Journeys (2020).