Louis Mottiat

{{short description|Belgian cyclist}}

{{Use dmy dates|date=April 2025}}

{{Infobox cyclist

| name = Louis Mottiat

| image = Louis_Mottiat.jpg

| fullname = Louis Mottiat

| nickname = De man van ijzer (The Iron Man)

| birth_date = {{Birth date|df=yes|1889|07|06}}

| birth_place = Bouffioulx, Belgium

| death_date = {{death date and age|df=yes|1972|06|05|1889|07|06}}

| death_place = Gilly, Belgium

| height =

| weight =

| currentteam =

| discipline = Road

| role = Rider

| ridertype =

| amateuryears1 =

| amateurteam1 =

| proyears1 = 1912–1913

| proteam1 = Thomann

| proyears2 = 1913–1914

| proteam2 = Alcyon

| proyears3 = 1919–1921

| proteam3 = Alcyon-La Sportive

| proyears4 = 1922–1926

| proteam4 = Alcyon-Dunlop

| majorwins = 8 stages Tour de France
Liège–Bastogne–Liège(2x)
Tour of Belgium (2x)

}}

Louis Mottiat (6 July 1889 – 5 June 1972) was a Belgian professional road bicycle racer. Mottiat was born in Bouffioulx, and because of his endurance was nicknamed 'the iron man'. His career was interrupted by World War I. He died in Gilly, aged 82.