This article lists the election results and representation of the Democratic Unionist Party with respect to the House of Commons of the United Kingdom,
| Election year | # of total votes | % of overall vote | # of seats won (NI) | Outcome |
|---|---|---|---|---|
| Feb 1974 [1] | 58,656 | 0.2% | 1 / 12 | Opposition |
| Oct 1974 [2] | 59,451 | 0.3% | 1 / 12 | Opposition |
| 1979 [3] | 70,795 | 0.2% | 3 / 12 | Opposition |
| 1983 [4] | 152,749 | 0.5% | 3 / 17 | Opposition |
| 1987 [5] | 85,642 | 0.3% | 3 / 17 | Opposition |
| 1992 [6] | 103,039 | 0.3% | 3 / 17 | Opposition |
| 1997 [7] | 107,348 | 0.3% | 2 / 18 | Opposition |
| 2001 [8] | 181,999 | 0.7% | 5 / 18 | Opposition |
| 2005 [9] | 241,856 | 0.9% | 9 / 18 | Opposition |
| 2010 [10] | 168,216 | 0.6% | 8 / 18 | Opposition |
| 2015 [11] | 184,260 | 0.6% | 8 / 18 | Opposition |
| 2017 [12] | 292,316 | 0.9% | 10 / 18 | Confidence and supply (Con minority gov't) |
| 2019 | 244,127 | 0.8% | 8 / 18 | Opposition |
| 2024 [13] | 172,058 | 5 / 18 | Opposition |
| Election | Northern Ireland Assembly | Total votes | Share of votes | Seats | +/- | Government |
|---|---|---|---|---|---|---|
| 1973 | 1973 Assembly | 78,228 | 10.8% | 8 / 78 | Opposition | |
| 1975 | Constitutional Convention | 97,073 | 14.8% | 12 / 78 | Fourth largest party | |
| 1982 | 1982 Assembly | 145,528 | 23.0% | 21 / 78 | Opposition | |
| 1996 | Forum | 141,413 | 18.8% | 24 / 110 | Second largest party | |
| 1998 | 1st Assembly | 145,917 | 18.5% | 20 / 108 | Junior party in coalition | |
| 2003 | 2nd Assembly | 177,944 | 25.7% | 30 / 108 | Largest party, direct rule | |
| 2007 | 3rd Assembly | 207,721 | 30.1% | 36 / 108 | Coalition | |
| 2011 | 4th Assembly | 198,436 | 30.0% | 38 / 108 | Coalition | |
| 2016 | 5th Assembly | 202,567 | 29.2% | 38 / 108 | Coalition | |
| 2017 | 6th Assembly | 225,413 | 28.1% | 28 / 90 | Coalition | |
| 2022 | 7th Assembly | 184,002 | 21.33% | 25 / 90 | TBD |
| Election | European Parliament | First-preference votes | Share of first-preference votes | Seats (NI) | +/- | Alliance |
|---|---|---|---|---|---|---|
| 1979 | First Parliament | 230,251 | 33.6% | 1 / 3 | n/a | Non-Inscrits |
| 1984 | Second Parliament | 170,688 | 29.8% | 1 / 3 | Non-Inscrits | |
| 1989 | Third Parliament | 160,110 | 29.9% | 1 / 3 | Non-Inscrits | |
| 1994 | Fourth Parliament | 163,246 | 29.2% | 1 / 3 | Non-Inscrits | |
| 1999 | Fifth Parliament | 192,762 | 28.4% | 1 / 3 | Non-Inscrits | |
| 2004 | Sixth Parliament | 175,761 | 32.0% | 1 / 3 | Non-Inscrits | |
| 2009 | Seventh Parliament | 88,346 | 18.2% | 1 / 3 | Non-Inscrits | |
| 2014 | Eighth Parliament | 131,163 | 20.9% | 1 / 3 | Non-Inscrits | |
| 2019 | Ninth Parliament | 124,991 | 21.8% | 1 / 3 | Non-Inscrits |