Gloucester-Southgate Ward (Ward 10) is a city ward located in Ottawa, Ontario. Located in the city's south end, the ward includes Gloucester Glen east of the Rideau River, most of the Ottawa International Airport, CFSU Uplands, Blossom Park, Greenboro, Hunt Club Park, portions of Heron Gate south of Walkley Road, the Ottawa South/Hawthorne Industrial Park and rural areas west of Anderson Road and north of Leitrim. Previously, the ward included the community of Riverside South located south of the airport but in a ward reorganization, the growing community was included in the new ward of Gloucester-South Nepean.

Prior to amalgamation, this area was covered by Southgate Ward on Ottawa City Council and Gloucester South Ward on Gloucester City Council. Southgate Ward was known as Billings Ward from 1980 to 1994, and Gloucester Ward prior to that. The ward was created in 1950, when the area was annexed from Gloucester Township. From 1952 to 1956 it was part of Ward 1.

Prior to 1950, the area was part of Gloucester Township. Township council was elected on an at-large basis, meaning no wards existed.

• Alex Roger (1950)
• Archibald Newman (1950-1952)
• Pat Doherty (1951-1952)

Ward merged with Rideau Ward to become Ward 1 from 1952-1956

• Pat Doherty (1957-1958)
• Alex Roger (1957-1960)
• Murray Heit (1957-1964)
• Pat Doherty (1961-1962)
• Don Kay (1963-1966)
• Pat Doherty (1965-1966)
• Jim Knubley (1967-1969)
• Joe Quinn (1967-1980)
• Pat Doherty (1970-1972)
• Brian Bourns (1980-1985)
• Joan O'Neill (1985-1994)
• Diane Deans (1994–2022)
• Jessica Bradley (2022–present)

Gloucester adopted a ward system in 1985. Gloucester South was represented by two city councillors until 1991.

• Claudette Cain (1985-1991)
• Harold Keenan (1985-1988)
• Mitch Owens (1988-1991)
• Daniel Beamish (1991-1994)
• George Barrett (1994-2000)

City council
Candidate		Vote	%
	Jessica Bradley	4,927	42.24
	Hussein Mahmoud	2,809	24.08
	Taylor Houstoun	2,557	21.92
	Aria Alavi	716	6.14
	John Redins	333	2.85
	Ron Keays	323	2.77

City council
Candidate		Vote	%
	Diane Deans	6,179	56.08
	Robert Swaita	3,435	31.17
	Alek Golijanin	875	7.94
	Sam Soucy	342	3.10
	Perry Sabourin	188	1.71

City council
Candidate		Vote	%
	Diane Deans	6,251	56.27
	Lilly Obina	2,397	21.58
	Brad Pye	963	8.67
	Rodaina Chahrour	952	8.57
	Mohamed Roble	401	3.61
	George Marko	102	0.92
	Meladul Haq Ahmadzai	43	0.39

Ottawa mayor (Ward results)
Candidate		Vote	%
	Jim Watson	8,259	76.47
	Mike Maguire	1,742	16.13
	Anwar Syed	406	3.76
	Rebecca Pyrah	108	1.00
	Robert White	106	0.98
	Michael St. Arnaud	73	0.68
	Darren W. Wood	62	0.57
	Bernard Couchman	44	0.41

City council
Candidate	Votes	%
Diane Deans	5774	48.48
Lilly Obina	3864	32.44
Wade Wallace	1938	16.27
Leslie Saintilma	334	2.80

City council
Candidate	Votes	%
Diane Deans	9242	74.73
Douglas Besharah	1660	13.42
David Allogia	1465	11.85

City council
Candidate	Votes	%
Diane Deans	6166	59.34
Harold Keenan	3917	37.70
David Lamothe	308	2.96

Following amalgamation, Ottawa City Councillor Diane Deans defeated Gloucester City councillor George Barrett.

City council
Candidate	Votes	%
Diane Deans	6,724	48.62
George Barrett	4,599	33.25
Bob Leedy	2,274	16.44
Anoop Rangi	234	1.69

Regional council: Gloucester-Southgate
Candidate	Votes	%
Dan Beamish	5,169	65.18
Joan O'Neill	2,761	34.82

Ottawa City Council: Southgate Ward
Candidate	Votes	%
Diane Deans	Acclaimed

Gloucester City Council: Gloucester South
Candidate	Votes	%
George Barrett	Acclaimed

Regional council: Ward 10
Candidate	Votes	%
Dan Beamish	6,091	60.84
James McMahon	1,484	14.82
Moe Royer	1,394	13.92
Kenneth McCarthy	1,042	10.41

Ottawa City Council: Ward 3
Candidate	Votes	%
Diane Deans	2,830	46.69
Gale McAuley	1,708	28.18
Wayne MacKinnon	818	13.50
Khal Ishraki	637	10.51
Tony Tiefenbach	68	1.12

Gloucester City Council: Gloucester South
Candidate	Votes	%
George Barrett	3,015	70.33
George Saade	873	20.36
Brent P. Colbert	399	9.31

Upon annexation by Ottawa, Gloucester Ward held a special election January 2, 1950. Two aldermen were elected.

City council
Candidate	Votes	%
Alex Roger	1,404	34.29
Archibald Newman	901	22.00
George C. Lyon	571	13.94
E. M. Fillman	355	8.67
J. C. S. Wolf	317	7.74
Michael Lackner	284	6.94
W. G. Lewis	263	6.42

• Map of Gloucester-Southgate Ward Archived 2011-05-26 at the Wayback Machine