* Vikings sailed up the Humber and invaded Lincolnshire
* Henry II visited Lincoln, one of several visits he made to the city
* Anthony Thorold, lawyer and politician, born. He served as MP for Grantham and later for Lincoln
* Pilgrim Fathers, many of whom had gathered in Lincolnshire, set sail for America
* Death of Anthony Tuckney, Puritan Theologian. He was born in Kirton in Holland and became vicar of St Botolph’s Boston in succession to John Cotton.
* Act of Parliament for improving the Fossdyke, the canal between Lincoln and Torksey on the Trent. The work was carried out by Samuel Fortrey.
* Leys House, Denton, built as a Public Elementary school
* Wrought iron gates made for St Peter Arches church, Lincoln by Francis Smith (re-erected at Nettleham Hall in 1856)
* Sir George Thorold of Harmston was Lord Mayor of London in this year
* Congregational Chapel built in Star Lane, Stamford
* William Cust of Grantham born. He was a distinguished naval officer, killed on duty aged 28
* Turnpike Road opened between Louth and Horncastle, also between Louth and Saltfleet
* Louth Navigation linking the town to the North Sea at Tetney completed, one of the earliest canals in the country
* All Saints church Stapleford rebuilt in red brick
* Saltfleet tower mill built on the old sea bank on what became known as Mill Lane
* Daniel Lambert, ‘world’s heaviest man’, was born on 13 March; he died and is buried in Stamford
* Church restorations at Butterwick (St Andrew) and Irby in the Marsh (All Saints)
* Original lock on the Witham at Bardney completed
* Lincoln horse races were held on the Heath to the south of the city for the last time
* The bank of the Trent breached near Torksey causing a flood which affected properties in Saxilby and Lincoln. The road from Lincoln to Gainsborough was impassable for 10 days (20 November)
* Rt Hon John Cust, MP for Grantham and Speaker of the House of Commons, died (22 January). ‘Fatigue of his office’ was said to be a contributory factor.
* Original lock built at Stamp End on the Witham in Lincoln; it was later relocated downstream
* Jean Ingelow, poet and novelist, born Boston (17 March), perhaps best known for her poem ‘The High Tide on the Coast of Lincolnshire’
* William Botterill, Hull-based architect of Wesleyan Methodist chapels in Market Rasen and Alford
* Henry Andrews, mathematician and astronomer, who was born 1744 at Frieston near Grantham (26 January)
* Sir Joseph Banks, naturalist, botanist and Lincolnshire landowner (London, 19 June)
* Peter Burrell (1754-1820) 1st Baron Gwydir, married into the Bertie family of Grimsthorpe. He was Boston MP from 1782 to 1796 and was a keen cricketer. He died 29 June.
* Arthur Thistlewood, who had been born at Tupholme, one-time pupil at Horncastle Grammar School, radical activist and part of the Cato Street conspiracy, hanged and decapitated at Newgate Prison (1 May)
* Normanby Park rebuilt for Sir Robert Sheffield (1786–1862) by Robert Smirke
* Lincoln Lunatic Asylum (later The Lawn) completed, Richard Ingleman the architect
* Sleaford Playhouse theatre was built for Joseph Smedley, a local printer and actor; it is a Grade II listed building.
* Chapels built at Crowle (Baptist), Kirton Holme (Wesleyan Methodist), Wainfleet All Saints (Wesleyan Methodist), Boston (Unitarian), Louth (Congregational), Lincoln (Tanners Lane, Independent)
* Windmills erected at Stickford (Barr Green), Mareham le Fen (Chatterton’s), Middle Rasen, Cleethorpes, East Kirkby (Barlow’s)
* St Germain’s church at Thurlby (NK) rebuilt; north aisle rebuilt at St Mary Horncastle
* Samuel Bamford sent to Lincoln Prison. The previous year he had been one of the speakers at Peterloo meeting which preceded the ‘massacre’.
* Lincolnshire Agricultural Society's first annual Show
* Coningsby Waldo Sibthorp of Canwick Hall elected to Parliament (8 March)
* Death of John Ross (1801-1870), antiquary
* Churches: new buildings at Hatton, St Stephen; Lincoln, St Peter in Eastgate; work began on St Swithin’s, Lincoln. Major restoration or partial rebuilding at Laceby St Margaret; Howell St Oswald; Mavis Enderby; Waltham All Saints; Hogsthorpe; Burton Pedwardine; Grayingham St Radegunda; Coningsby St Michael; Metheringham St Wilfrid.
* Chapels opened at East Butterwick (PM); Horncastle, Queen St (WM); Lincoln Bracebridge (FM); East Stockwith (PM); Lincoln, Mint Street (Baptist); Sutton St Edmund (WM); Bleasby Moor (WM); Grantham, Castlegate (Congregational).
* Other buildings: Spridlington School opened; Oddfellows Hall erected at Ingoldsby; Becklands, Barnoldby le Beck built for Henri Jossi, Grimsby businessman;
* Dr Charles Plumpton, mathematician
* Doris Stokes, spiritualist and psychic medium, at Grantham (6 January)
* A E (Ted) Smith (1920 - 2015), conservation pioneer who played key role in foundation of Lincolnshire Wildlife Trust
* William Garfit (b. Boston), banker and Conservative politician, onetime High Sheriff of Lincolnshire and MP for Boston (29 October)
* Peacock, Mabel Geraldine Woodruffe (born 1856) Lincolnshire folklore collector
* Hanging rood installed in Lincoln St Peter at Gowts
* Sleaford cinema, originally known as Picturedrome Cinema, opened with 900 seats
* Victoria Hotel, Woodhall Spa burned down, caused by when an electrical fault (4 April)
* Mumby post mill, said to date from the seventeenth century, was demolished, though the mill house in Mill Lane still survives.
* Coliseum Picture Theatre opened in High Street, Cleethorpes
* First World War memorials unveiled in many Lincolnshire towns and villages
* Serious flood in Louth, 23 lives lost (29 May)
* Stone copings and railings fitted on Tattershall Bridge
* Lincoln’s tramway converted to overhead trolley system
* Greetwell ironstone mine, east of Lincoln closed. It had opened in 1875 and was worked by the Mid Lincolnshire Ironstone Company.
* Institution of Mechanical Engineers held their week-long conference in Lincoln
* The Bracebridge Council Schools were transferred to the City of Lincoln as a result of boundary changes
* East Lincolnshire railway line from Boston to Grimsby and the section of the Loop Line from Boston to Lincoln closed for passengers (5 October)
* ‘Roman Lincolnshire’ by J B Whitwell, first book in History of Lincolnshire series, published by SLHA
* Primary schools closed at Hainton, Careby and East Stockwith
* Methodist chapels closed at Thorpe Bank (PM) and Sutton St Edmund (UM)
* Scunthorpe Centenary Methodist Church burnt down (21 August)
* Horncastle's former Drill Hall on Boston Road reconfigured as the Town Hall