Cognomen Loudenslager (Loudenslager 
) , throughout the world, is a rare family name. The last name Loudenslager is habitual in the United States, where it is a rare surname, Venezuela, where it is a very rare surname, and Canada, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Loudenslager | Venezuela, United States, Canada |
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henry c. loudenslager American politician (1852-1911), US (b. 1852) |
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| charlie loudenslager Major League Baseball player, US (b. 1881) |
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| leo loudenslager American aviator, US (b. 1944) |
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