WLB may refer to:
Organisations Welsh Language Board, a former UK statutory body Wiener Lokalbahnen, an Austrian railway company Württembergische Landesbibliothek, the Württemberg State Library, in Stuttgart, Germany
Other uses Radio K, Minnesota, US, by former callsign USCG seagoing buoy tender, by hull classification symbol Wiffle League Ball, a wiffle ball league Work–life balance, a concept referring to proper prioritizing between career and personal life development Weakside linebacker, a defensive position in American and Canadian football What Lies Beneath (Tarja album), an album from Finnish singer Tarja