See main article: Northern Ireland local elections, 1973.
| Election Name: | 1973 North Down Borough Council election |
| Type: | parliamentary |
| Ongoing: | no |
| Next Election: | 1977 North Down Borough Council election |
| Next Year: | 1977 |
| Seats For Election: | All 20 seats to North Down Borough Council |
| Majority Seats: | 11 |
| Party1: | Ulster Unionist Party |
| Seats1: | 9 |
| Party2: | Alliance Party of Northern Ireland |
| Seats2: | 7 |
| Party3: | Loyalist |
| Seats3: | 4 |
Elections to North Down Borough Council were held on 30 May 1973 on the same day as the other Northern Irish local government elections. The election used four district electoral areas to elect a total of 20 councillors.
The elections were the first following the reorganisation of local government in Northern Ireland, brought about by the Local Government (Boundaries) Act (Northern Ireland) 1971 & Local Government Act (Northern Ireland) 1972, which replaced the previous FPTP ward system with a new system of proportional representation using multi-member district electoral areas.
| Party | valign=top | Seats | valign=top | ± | valign=top | First Pref. votes | valign=top | FPv% | valign=top | ±% |
|---|---|---|---|---|---|---|---|---|---|---|
| 9 | 11,977 | 46.0 | ||||||||
| 7 | 7,691 | 29.5 | ||||||||
| Loyalist | 4 | 4,638 | 17.8 | |||||||
| 0 | 1,282 | 4.9 | ||||||||
| 0 | 315 | 1.2 | ||||||||
| 0 | 148 | 0.6 | ||||||||
| Totals | align=right | 20 | align=right | 26,393 | 100.0 | — |
[1] |- class="unsortable" align="centre"!rowspan=2 align="left"|Ward! %
!Cllrs
! %
!Cllrs
! %
!Cllrs
!rowspan=2|Total
Cllrs
|- class="unsortable" align="center"!colspan=2 bgcolor="" | UUP!colspan=2 bgcolor="" | Alliance!colspan=2 bgcolor="white"|
1973: 3 x UUP, 2 x Alliance
1973: 2 x UUP, 2 x Loyalist, 1 x Alliance
1973: 2 x Alliance, 2 x UUP, 1 x Loyalist
1973: 2 x UUP, 2 x Alliance, 1 x Loyalist