Langan (1912–2004) was a Mobile, Alabama-area community leader and politician who served four terms on the Mobile City Commission; during this period he also served several one-year terms as Mayor of Mobile.
The office was rotated among the three commissioners and was co-extensive with the presidency of the City Commission.
Mobile's largest municipal park was named after him.
Langan also served as a state senator, where he worked to extend voting rights for African Americans (who had been essentially disenfranchised since the turn of the century.) He opposed the Dixiecrat movement in the Democratic Party.
As a Mobile commissioner, Langan expanded the size of the city through annexation to provide for growth and increase the tax base.
He crafted a moderate approach to advancing the equality of African-American citizens in years of increasing civil rights activism.