Grossdietwil

Infobox Swiss town
subject_name = Grossdietwil
municipality_name = Grossdietwil
municipality_type = municipality
imagepath_coa = Pic_Grossdietwil.png|pixel_coa=

languages = German
canton = Lucerne
iso-code-region = CH-LU
district = Willisau
lat_d=47|lat_m=10|lat_NS=N|long_d=7|long_m=53|long_EW=E
postal_code = 6146
municipality_code = 1131
area = 10.23
elevation = 571|elevation_description=
population = 822|populationof = December 2004 | popofyear = 2004
website = www.grossdietwil.ch
mayor = |mayor_asof=|mayor_party=
mayor_title = |list_of_mayors =
places =
demonym =
neighboring_municipalities= Altbüron, Ebersecken, Fischbach, Gondiswil (BE), Melchnau (BE), Ohmstal, Pfaffnau, Reiden, Roggliswil
twintowns = |

Grossdietwil is a municipality in the district of Willisau in the canton of Lucerne in Switzerland.