Parliamentary constituencies in Hertfordshire

The county of Hertfordshire in England is divided into twelve^{[nb 1]} parliamentary constituencies. Each of the twelve elects a Member of Parliament (MP) to represent it at the United Kingdom (UK) Parliament in Westminster. As of the 2024 general election, seven of Hertfordshire's MPs are from the Labour Party, three are Conservatives, and two are Liberal Democrats. The county currently has one urban borough constituency (BC) – Watford - while the other eleven are classed as more rural county constituencies (CC).

Name^{[nb 2]}	Electorate^[2]	Majority^[3]^{[nb 3]}
Broxbourne CC	75,454	2,858	Lewis Cocking †	Catherine Deakin ‡
Harpenden and Berkhamsted CC	71,635	10,708	Victoria Collins ¤	Nigel Gardner †
Hemel Hempstead CC	70,496	4,857	David Taylor ‡	Andrew Williams †
Hertford and Stortford CC	75,396	4,748	Josh Dean ‡	Julie Marson †
Hertsmere CC	73,256	7,992	Oliver Dowden †	Josh Tapper ‡
Hitchin CC	72,112	7,109	Alistair Strathern ‡	Bim Afolami †
North East Hertfordshire CC	76,849	1,923	Chris Hinchliff ‡	Nikki da Costa †
South West Hertfordshire CC	71,552	4,456	Gagan Mohindra †	Sally Symington ¤
St Albans CC	70,881	19,834	Daisy Cooper ¤	James Spencer †
Stevenage CC	70,370	6,618	Kevin Bonavia ‡	Alex Clarkson †
Watford BC	70,576	4,723	Matt Turmaine ‡	Dean Russell †
Welwyn Hatfield CC	74,535	3,799	Andrew Lewin ‡	Grant Shapps †

Party	Votes	%	Change from 2019	Seats	Change from 2019
Labour	177,658	30.5%	7.0%	7	7
Conservative	177,264	30.4%	22.3%	3	7
Liberal Democrats	108,704	18.6%	0.3%	2	1
Reform UK	80,967	13.9%	New	0	New
Green	33,850	5.8%	3.3%	0	0
Others	5,492	0.8%	2.2%	0	0
Total	583,127	100.0		12

Election year	1974 (Feb)	1974 (Oct)	1979	1983	1987	1992	1997	2001	2005	2010	2015	2017	2019	2024
Labour	35.0	38.5	34.4	19.0	19.8	25.5	39.7	38.9	30.2	19.0	22.4	32.1	23.5	30.5
Conservative	40.4	41.3	51.1	50.3	52.0	53.3	40.6	41.8	44.8	50.4	52.6	54.3	52.7	30.4
Liberal Democrat¹	24.4	19.8	13.2	30.2	27.8	20.3	16.0	16.9	21.4	24.0	8.7	9.9	18.3	18.6
Reform UK	-	-	-	-	-	-	-	-	-	-	-	-	-	13.9
Green Party	-	-	-	-	*	*	*	*	*	0.8	3.6	2.3	2.5	5.8
UKIP	-	-	-	-	-	-	*	*	*	3.3	12.5	1.2	*	*
Other	0.2	0.4	1.3	0.5	0.4	0.9	3.7	2.4	3.6	2.5	0.2	0.2	3.0	0.8

Election year	1974 (Feb)	1974 (Oct)	1979	1983	1987	1992	1997	2001	2005	2010	2015	2017	2019	2024
Labour	2	4	0	0	0	0	5	5	2	0	0	0	0	7^[a]
Conservative	7	5	9	10	10	10	6	6	9	11	11	11	10	3
Liberal Democrat¹	0	0	0	0	0	0	0	0	0	0	0	0	1	2
Total	9	9	9	10	10	10	11	11	11	11	11	11	11	12^[a]

Constituencies

Constituency	Years
Constituency	1290–1298	1298–1307	1307–1852	1852–1885	1885–1918	1918–1945	1945–1950	1950–1955	1955–1974	1974–1983	1983–1997	1997–2024	2024-present*
Hertfordshire^[10]	1290–1885
Hertford^[10]^[11]		1298–1974
St Albans^{[nb 4]}^[10]^[11]			1307–1852		1885–*
Watford^[11]					1885–*
Hitchin^[11]					1885–1983								2024–*
Hemel Hempstead^[12]						1918–1983						1997–*
Barnet							1945–1974			Transferred to Greater London
South West Hertfordshire^[13]^[14]								1950–*
East Hertfordshire^[15]									1955–1983
Hertford and Stevenage										1974–1983
South Hertfordshire										1974–1983
Welwyn Hatfield										1974–*
North Hertfordshire											1983–1997
West Hertfordshire											1983–1997
Broxbourne											1983–*
Hertford and Stortford											1983–*
Hertsmere											1983–*
Stevenage											1983–*
Hitchin and Harpenden												1997–2024
North East Hertfordshire												1997–*
Harpenden and Berkhamsted													2024–*

Constituency	1955	1959	1964	Feb 1974	Oct 1974	1979	79
Barnet	Maudling			Transferred to Greater London
Hemel Hempstead	Davidson	Allason			Corbett	Lyell
Hertford / Hertford & Stevenage (1974)	Lindsay			Williams		Wells
Hitchin	Maddan		Williams	Stewart
St Albans	Grimston	Goodhew
Watford	Farey-Jones		Tuck			Garel-Jones
Hertfordshire SW	Longden			Dodsworth			Page
Hertfordshire East	Walker-Smith
Hertfordshire South				Parkinson
Welwyn and Hatfield				Lindsay	Hayman	Murphy