Compiled by EveryElectionResult.com's data team · Last updated 2026-08-30
South Londonderry was won by Irish Unionist at the 1918 general election, with a majority of 4,961 votes over Irish Parliamentary Party. This page covers every general election in South Londonderry from 1885 to 1918.
Full Election History, 1885–1918
Election
Elected
Votes
Vote Share
Runner-up
Majority
Turnout
1885
Timothy Michael Healy (Irish Parliamentary Party)
4,723
53.2%
Hugh McCalmont (Irish Unionist)
2,382 (26.8 pts)
82.3%
1886
Thomas Lea (Liberal Unionist)
4,737
50.6%
Timothy Michael Healy (Irish Parliamentary Party)
108 (1.1 pts)
86.8%
1892
Thomas Lea (Liberal Unionist)
4,554
52.9%
Samuel Walker (Liberal)
501 (5.8 pts)
91.8%
1895
Thomas Lea (Liberal Unionist)
4,485
52.4%
William Huston Dodd (Liberal)
417 (4.9 pts)
92.5%
1900
John Gordon (Liberal Unionist)
Elected unopposed — no other candidate stood, no vote count on record
0.0%
1906
John Gordon (Liberal Unionist)
3,847
50.5%
Samuel Robert Keightley (Russellite Unionist)
71 (0.9 pts)
91.7%
Jan 1910
John Gordon (Liberal Unionist)
3,985
52.0%
Samuel Robert Keightley (Liberal)
307 (4.0 pts)
95.2%
Dec 1910
John Gordon (Liberal Unionist)
3,845
52.3%
William John Johnston (Liberal)
332 (4.5 pts)
91.4%
1918
Denis Stanislaus Henry (Irish Unionist)
8,942
54.7%
Arthur William Conway (Irish Parliamentary Party)
4,961 (30.3 pts)
77.1%
Full Result Breakdown by Election
1885
Candidate
Party
Votes
Share
Elected
Timothy Michael Healy
Irish Parliamentary Party
4,723
53.2%
Yes
Hugh McCalmont
Irish Unionist
2,341
26.4%
No
William Findlater
Liberal
1,816
20.5%
No
1886
Candidate
Party
Votes
Share
Elected
Thomas Lea
Liberal Unionist
4,737
50.6%
Yes
Timothy Michael Healy
Irish Parliamentary Party
4,629
49.4%
No
1892
Candidate
Party
Votes
Share
Elected
Thomas Lea
Liberal Unionist
4,554
52.9%
Yes
Samuel Walker
Liberal
4,053
47.1%
No
1895
Candidate
Party
Votes
Share
Elected
Thomas Lea
Liberal Unionist
4,485
52.4%
Yes
William Huston Dodd
Liberal
4,068
47.6%
No
1900
Candidate
Party
Votes
Share
Elected
John Gordon
Liberal Unionist
Unopposed
Yes
1906
Candidate
Party
Votes
Share
Elected
John Gordon
Liberal Unionist
3,847
50.5%
Yes
Samuel Robert Keightley
Russellite Unionist
3,776
49.5%
No
Jan 1910
Candidate
Party
Votes
Share
Elected
John Gordon
Liberal Unionist
3,985
52.0%
Yes
Samuel Robert Keightley
Liberal
3,678
48.0%
No
Dec 1910
Candidate
Party
Votes
Share
Elected
John Gordon
Liberal Unionist
3,845
52.3%
Yes
William John Johnston
Liberal
3,513
47.7%
No
1918
Candidate
Party
Votes
Share
Elected
Denis Stanislaus Henry
Irish Unionist
8,942
54.7%
Yes
Arthur William Conway
Irish Parliamentary Party
3,981
24.4%
No
Louis Joseph Walsh
Sinn Féin
3,425
21.0%
No
Margin Over Time
Winning margin (percentage points) at each election, coloured by the winning party.
Trend
South Londonderry has been contested at 9 general elections on record since 1885. Parties that have won a seat here over that span: Irish Parliamentary Party, Liberal Unionist, Irish Unionist.
Frequently Asked Questions
Who won South Londonderry in the 1918 general election?
Irish Unionist won South Londonderry in 1918 with 8,942 votes (54.7%), a majority of 4,961 votes over Irish Parliamentary Party in second place.
Which parties have won South Londonderry since 1885?
Since 1885, South Londonderry has been won by: Irish Parliamentary Party, Irish Unionist, Liberal Unionist.
What was the closest result in South Londonderry?
The closest result on record for South Londonderry was 1906, when Liberal Unionist beat Russellite Unionist by just 71 votes (0.9 percentage points).