Lemannville is an unincorporated community and census-designated place in Ascension and St. James parishes, Louisiana, United States.

It was first listed as a CDP in the 2010 Census.

[2] Lemannville is located on the west bank of the Mississippi River along Louisiana Highway 18, 6 miles (10 km) east of Donaldsonville and 60 miles (100 km) west of New Orleans.

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