Lewis Baker may refer to:

• Lewis Baker (politician) (1832–1899), West Virginia politician and diplomat
• Lewis Baker (gridiron football) (born 1984), American football player for the San Francisco 49ers
• Lewis Baker (slugger) (c. 1825–?), American police officer employed as a "slugger" for Tammany Hall
• Lewis Baker (footballer) (born 1995), English footballer
• Lewis Baker (cricketer) (1920–1997), New Zealand cricketer

• Louis Baker, musician