|OS grid reference|
|• London||140 mi (230 km) S|
|Sovereign state||United Kingdom|
|EU Parliament||Yorkshire and the Humber|
Waltham is a large village and civil parish in North East Lincolnshire, England. It is 4 miles (6 km) south of Grimsby and is close to the mostly smaller villages of Scartho, Brigsley, Barnoldby-le-Beck, and Holton le Clay. Less than 2 miles (3 km) to the east-north-east is the village of New Waltham. In the 2001 census, Waltham had a population of 6,420, reducing slightly to 6,413 at the 2011 census.
There was a substantial Saxon settlement on the site of the first village, and artifacts show earlier Roman occupation. The Waltham name is of Saxon origin: Walt refers to woodland or an area of high forest and Ham to either an estate or a village. Saxons may have changed the name from the Old English 'Wealdhant' which had the same meaning; the first part Ald, prefixed by We, meant "settlement", and Hant a "wooded estate".
Elizabeth Shaw, who is said to have lived to age 117, was born on 22 April 1683 at Waltham. A life portrait of her by R. Sheardown was published in 1800.
Waltham is part of the Cleethorpes parliamentary constituency, and has been represented by Martin Vickers of the Conservative Party since 2010.
Waltham Ward is part of North East Lincolnshire Council, and covers the villages of Waltham, Brigsley and Ashby-cum-Fenby.  It is one of the safest Conservative wards on the council and has been represented by Conservative councillors since the ward's creation in 2003. 
Current elected councillors:
Waltham's landmarks include Waltham Windmill, which is used as the symbol for the village's Infant and Junior schools. The windmill was originally built in 1666, but was blown down several times. It was last re-built in 1873.
Nearby is the former Second World War bomber airfield RAF Grimsby, which was originally Grimsby Municipal Airport. After the start of the Second World War the airport was re-constructed by the Air Ministry and became home to 142 Squadron, and later to 100 and 550 Squadrons, before closing in 1945. A museum at the Waltham Windmill houses a section dedicated to RAF Grimsby.
- Joanne Clifton, professional dancer on BBC TV's Strictly Come Dancing, and her brother and fellow pro Kevin Clifton
- Paul Moorby O.B.E., (b. 1964) was appointed Officer of the Order of the British Empire on 29th December 2018 for services to promoting the UK Technology Sector Abroad 
- Office for National Statistics : Census 2001 : Parish Headcounts : North East Lincolnshire Retrieved 18 September 2009
- "Parish population 2011". Retrieved 17 August 2015.
- "Wellcome Library, London, no. 1814i".
- "Waltham ward - North East Lincolnshire Council".
- "Data" (PDF). www.electionscentre.co.uk. 2015.
- "Cllr Pettigrew, Nick (Conservative) - North East Lincolnshire Council".
- "Cllr Jackson, Philip (Conservative) - North East Lincolnshire Council".
- " Waltham local history and village churches", homepage.ntlworld.com/bazzer3. Retrieved 13 August 2011
- "A Little History", walthamwindmill.co.uk. Retrieved 13 August 2011
- "Bits of info for you", homepage.ntlworld.com/bazzer3. Retrieved 13 August 2011
- British Railways Atlas 1947, p. 17
- Media related to Waltham, Lincolnshire at Wikimedia Commons