E9 or E-9 may refer to:

Roads and trails

• European route E09
• European walking route E9
• E9, the Besraya Expressway in Malaysia
• Kyoto Jūkan Expressway, San'in Kinki Expressway and San'in Expressway, route E9 in Japan

Vehicles

• BMW E9, a two-door coupé built for BMW by Karmann from 1968 to 1975
• EMD E9, a diesel locomotive
• E-9A Widget, U.S. Air Force range control aircraft

Other uses

• E9 (countries) a forum of nine highly populated countries
• E9 (Lie algebra) (E₉), another name for the infinite dimensional affine Lie algebra
• E9 tuning, a common tuning for steel guitar necks of more than six strings
• E9, a baseball scorekeeping abbreviation for an error on the right fielder
• E9, a postcode district in the E postcode area of the London postal district
• Boston-Maine Airways IATA code
• E-9, a U.S. uniformed services pay grade

Topics referred to by the same term

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