The 2003 Hamilton municipal election was held on November 10, 2003, to elect municipal officials in Hamilton, Ontario. On election day, Hamiltonians elected a mayor, 15 city councillors, and trustees for the Hamilton-Wentworth District School Board, Hamilton-Wentworth Catholic District School Board, Conseil scolaire Viamonde, and Conseil scolaire catholique MonAvenir.

Mayoral election

!rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±%

City Council Election

Ward One (Chedoke-Cootes)

The race for Ward One councillor was marked by nine-year incumbent councillor Marvin Caplan's faltering support because of a major issue. During the campaign Marvin Caplan openly supported the completion of the Red Hill Creek Expressway, opposed by a majority of Ward One's residents. Challenger Brian McHattie, who had run for Mayor in 1997, was a 43-year-old environmental consultant at the time of the election, and received support due to his opposition to the Red Hill Creek Expressway. Michael Puskas, the third candidate in the race, was a local lawyer who echoed Caplan's support for the Expressway. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±%

Ward Two (Downtown)

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Ward Three (Hamilton Centre)

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Ward Four (East Hamilton)

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Ward Five (Redhill)

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Ward Six (East Mountain)

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Ward Seven (Central Mountain)

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Ward Eight (West Mountain)

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Ward Nine (Upper Stoney Creek)

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Ward Ten (Lower Stoney Creek)

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Ward Eleven (Glanbrook Winona)

!rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% !colspan="3" style="text-align:center;" | Acclaimed

Ward Twelve (Ancaster)

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Ward Thirteen (Dundas)

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Ward Fourteen (Wentworth)

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Ward Fifteen (Flamborough)

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Public School Board Election

The 2003 election for trustees to the Hamilton-Wentworth District School Board was marked by numerous acclamations, despite the board being put under provincial supervision from August 2002 to October 2003 for failing to pass a balanced budget. A provincial report critiqued trustees and the supervisor placed in charge of the board accused trustees of being "parent advocates, rather than system leaders". !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% !colspan="3" style="text-align:center;" | Acclaimed Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% !colspan="3" style="text-align:center;" | Acclaimed Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% !colspan="3" style="text-align:center;" | Acclaimed Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% !colspan="3" style="text-align:center;" | Acclaimed Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates.

Catholic School Board Election

!rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% !colspan="3" style="text-align:center;" | Acclaimed Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% !colspan="3" style="text-align:center;" | Acclaimed Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% !colspan="3" style="text-align:center;" | Acclaimed Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% !colspan="3" style="text-align:center;" | Acclaimed Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% 2018 Municipal election Note: This ward elected two Catholic trustees and percentages are specific to each candidate, not for the overall total. Note: All Hamilton Municipal Elections are officially non-partisan. Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates. !rowspan="2" colspan="2"|Candidate !colspan="3"|Popular vote ! Votes ! % ! ±% !colspan="3" style="text-align:center;" | Acclaimed Note: Candidate campaign colours are based on the prominent colour used in campaign items (signs, literature, etc.) and are used as a visual differentiation between candidates.