Lardal (Urban East Norwegian: [ˈlɑ̂rdɑːɫ][4]) is a former municipality in Vestfold county, Norway.

[6] The parish of Laurdal (later spelled Lardal) was established as a municipality on 1 January 1838 (see formannskapsdistrikt law).

On 1 January 1983, an unpopulated area of Bergan, just south of Steinsholt, was transferred to Lardal from the neighboring municipality of Hedrum.

On 9 January 1987, another unpopulated area was transferred to Lardal from the neighboring municipality of Hedrum.

The hulder has a tincture of Or which means it is commonly colored yellow, but if it is made out of metal, then gold is used.

The municipal council (Kommunestyre) of Lardal was made up of representatives that were elected to four year terms.