Pfaffnau

Infobox Swiss town
subject_name = Pfaffnau
municipality_name = Pfaffnau
municipality_type = municipality
imagepath_coa = Pic_Pfaffnau.png|pixel_coa=

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languages = German
canton = Lucerne
iso-code-region = CH-LU
district = Willisau
lat_d=47|lat_m=14|lat_NS=N|long_d=7|long_m=54|long_EW=E
postal_code = 4915,6264
municipality_code = 1139
area = 17.57
elevation = 507|elevation_description=
population = 2099|populationof = December 2004 | popofyear = 2004
website = www.pfaffnau.ch
mayor = |mayor_asof=|mayor_party=
mayor_title = |list_of_mayors =
places =
demonym =
neighboring_municipalities= Altbüron, Brittnau (AG), Grossdietwil, Melchnau (BE), Murgenthal (AG), Reiden, Roggliswil, Roggwil (BE), Untersteckholz (BE)
twintowns = |

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