The following is a timeline of the history of the city of Plano, Texas, USA.

19th century

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• 1848 - Town of Fillmore founded.^[1]
• 1852 - Fillmore renamed "Plano."^[1]
• 1870 - Population reaches 155.^[2]
• 1872 - Houston and Texas Central Railway begins operating.^[1]
• 1873 - Town of Plano incorporated.^[1]
• 1883 - Telephone in use (approximate date).^[2]
• 1891 - Plano Public School established.
• 1894
  • Fire Department organized.^[2]
  • Plano Milling Company (flour mill) in business.^[2]
• 1900 - Population: 1,304.^[2]

20th century

• 1902 - Star-Courier newspaper begins publication.^[3]
• 1908 - Plano Station, Texas Electric Railway built.
• 1913 - Palace Theater in business.^[4]
• 1923 - City hall building constructed.^[2]
• 1951 - North Texas Municipal Water District established.^[2]
• 1960 - Population: 3,695.^[2]
• 1962 - City of Plano incorporated.^[1]
• 1965 - Population: 13,097.^[2]
• 1969 - Plano Drive-In cinema in business.^[4]
• 1970 - Population: 17,872.^[2]
• 1977 - John Clark Stadium (school stadium) opens.
• 1980
  • Dallas Area Rapid Transit bus begins operating.^[2]
  • Population: 72,331.^[2]
• 1981
  • Collin Creek Mall in business.
  • Plano East Senior High School established.
• 1985 - Dick Armey becomes U.S. representative for Texas's 26th congressional district.^[5]
• 1986 - Heritage Farmstead Museum opens (in 1891 farmhouse).
• 1990 - Population: 128,713.^[2]
• 1991
  • Republic of Texas Press in business (approximate date).^{[citation needed]}
  • Sam Johnson becomes U.S. representative for Texas's 3rd congressional district.^[6]
• 1997 - Prestonwood Christian Academy established.
• 1999
  • City website online (approximate date).^[7][8]
  • Prestonwood Baptist Church (later megachurch) built.^[9]
  • Plano West Senior High School established.

21st century

• 2001 - Shops at Willow Bend in business.
• 2002 - Dallas Area Rapid Transit Light Rail begins operating; Downtown Plano station opens.^[2]
• 2009 - Phil Dyer becomes mayor.^[2]
• 2010 - Population: city 259,841;^[10] megaregion 19,728,244.^[11]
• 2013 - Harry LaRosiliere becomes mayor.
• 2015 - East Plano Islamic Center (EPIC Masjid) built.
• 2016 - Toyota Motor Corporation North American headquarters built.^[12]
• 2017 - Marriott Renaissance hotel built in Legacy West.^[13]
• 2021 - A masked gunman suspected of an earlier murder in Garland is shot and killed after opening fire at the Plano Police Department headquarters, in what is believed to be an act inspired by terrorists.^[14]