León Municipality, Guanajuato
{{Infobox settlement
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|image_skyline =Templo Expiatorio - León, Guanajuato.jpg
|caption = Sign in the Plaza Expiatorio
|settlement_type = Municipality
|coordinates = {{coord|21|07|11|N|101|40|50|W}}
|image_map = File:Leon en Guanajuato.jpg
|map_caption = Municipality of León in Guanajuato
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|pushpin_map = Mexico Guanajuato#Mexico
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|subdivision_type = Country
|subdivision_name = {{flag|Mexico}}
|subdivision_type1 = State
|subdivision_name1 = Guanajuato
|subdivision_type2 = Municipality
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|seat_type = Municipal seat
|seat = León
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|established_title = Founded
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|area_total_km2 = 1221
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| population_as_of = 2020https://www.inegi.org.mx/app/cpv/2020/resultadosrapidos/default.html?texto=León
| population_total = 1,721,215
| population_blank1_title = Seat
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|timezone = Central (US Central)
|utc_offset = -6
|timezone_DST = Central
|utc_offset_DST = -5
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León Municipality is a municipality in the state of Guanajuato. Its municipal seat is located in the city of León. According to the 2020 census, the municipality had a population of 1,721,215.
It is the third most populous municipality in Mexico, behind Mexico City and Tijuana. The city contains about 91% of the municipalities' population.