Blue wall

Blue wall may refer to:


 * Blue wall (U.S. politics), a high-population group of U.S. states leaning toward the Democratic Party in most presidential elections
 * Blue wall (British politics), a group of Conservative-leaning UK parliamentary constituencies which are seen as shifting away from the party
 * Blue wall of silence, an informal code among some police officers not to report wrongdoing by fellow officers
 * "The Blue Wall", an episode of the television series Law & Order (season 1)
 * The Blue Wall, a 2018 documentary film about the Chicago murder of Laquan McDonald, updated in 2019 as 16 Shots