1655: Petition for Groton Plantation granted May 23rd by General Court in Boston. Deane Winthrop, first named petitioner and selectman, names the town Groton after his birthplace in England.
1666: First meetinghouse in Groton was built at Hollis Street and Martins Pond Road
1676: Groton is attacked several times in March during King Philip’s War. On March 13th most of the town burns down and all settlers flee.
1678: Settlers return to rebuild the town
1694: Groton attacked by Native Americans during King William’s War. Longley family members were killed or abducted during the attacks.
1714: Third meetinghouse built on site of First Parish Church. Nashobah (now Littleton) breaks away from Groton.
1724: Last person in Groton killed by Native Americans.
1730: Land that is now Harvard and Westford break away from Groton
1753: Land that is now Shirley and Pepperell break away from Groton
1755: Fourth meetinghouse, now the First Parish Church, built.
1786: Local participants in Shays Rebellion led by Job Shattuck
1793: Groton Academy incorporated, name later changed to Lawrence Academy
1797: Main Street straightened
1802: Groton’s first fire fighting pumper built by Loammi Baldwin
1828: John Fitch discovers and quarries soapstone on his farm on Common Street
1829: The Groton Herald, the earliest town paper, published for nine months
1839: First Parish Meetinghouse remodeled and turned
1848: First passenger train comes through Groton
1851: George Boutwell elected Governor of Massachusetts
1854: Groton Public Library established
1861: Groton Artillery becomes Company B Sixth Regiment of Massachusetts
1869: President Grant visits Groton
and stays at the Boutwell House
1871: Land that is now Ayer breaks away from Groton
1873: Groton Grange established
1884: Groton school founded by Endicott Peabody
1893: Public Library opens
1894: Georgianna Boutwell founds Historical Society
1898: West Groton Library branch opens
1902: Main Street paved
1905: Telephone company has 120 customers
1909: First electric lights in town
1914: Tarbell School built in West Groton
1915: Boutwell School built on Hollis Street
1922: Town Forest established
1936: Severe flood
1946: First two way radio systems for police and fire departments
1955: Groton celebrates its 300th anniversary
1964: Historic Districts Commission formed
1974: West Groton Library branch closes
1975: Groton-Dunstable Regional School District established
1986: Groton wired for local access cable TV
1992: First Annual Groton Road Race
1996: Post Office moves to Boston Road
2002: Rail Trail opens
2005: Groton’s 350th anniversary