Men's 100 metre freestyle at the 2009 FINA World Championships
Venue	Foro Italico
Dates	29 July 2009 (heats, semifinals) 30 July 2009 (final)
Competitors	211
Winning time	46.91 WR
Medalists
César Cielo Filho    Brazil   Alain Bernard    France   Frédérick Bousquet    France
← 2007 2011 →

The men's 100 m freestyle at the 2009 World Championships took place on 29 July (heats and semifinals) and the evening of 30 July (finals) at the Foro Italico in Rome, Italy.

Prior to this competition, the existing world and competition records were as follows:

World record	Eamon Sullivan (AUS)	47.05	Beijing, China	13 August 2008
Championship record	Filippo Magnini (ITA)	48.12	Montreal, Canada	28 July 2005

The following records were established during the competition:

Date	Round	Name	Nationality	Time	Record
26 July	Heat 3*	Brent Hayden	Canada	47.77	CR
26 July	Heat 4*	Stefan Nystrand	Sweden	47.52	CR
26 July	Heat 5*	César Cielo Filho	Brazil	47.39	CR
26 July	Final*	César Cielo Filho	Brazil	47.09	CR
30 July	Final	César Cielo Filho	Brazil	46.91	WR

* Split from the men's 4 × 100 m freestyle relay

Rank	Name	Nationality	Time	Heat	Lane	Notes
1	David Walters	USA	47.59	21	6
2	Stefan Nystrand	Sweden	47.66	21	5
3	Lyndon Ferns	South Africa	47.79	21	3	AF
4	Alain Bernard	France	47.80	22	4
5	Brent Hayden	Canada	47.83	22	6
6	Frédérick Bousquet	France	47.89	21	4
7	Evgeniy Lagunov	Russia	47.92	20	2
8	César Cielo	Brazil	47.98	22	5
9	Andrey Grechin	Russia	48.13	20	4
9	Nathan Adrian	USA	48.13	22	3
11	Duje Draganja	Croatia	48.18	18	5
12	Nicolas Oliveira	Brazil	48.22	21	1
13	Filippo Magnini	Italy	48.23	20	3
14	Matt Targett	Australia	48.26	20	5
15	Konrad Czerniak	Poland	48.32	21	7
16	Joel Greenshields	Canada	48.43	21	2
17	Matthew Abood	Australia	48.45	19	4
18	Shaune Fraser	Cayman Islands	48.47	18	3
19	Brett Fraser	Cayman Islands	48.56	10	6
20	Simon Burnett	Great Britain	48.57	20	6
21	Christian Galenda	Italy	48.62	22	7
22	Steffen Deibler	Germany	48.68	19	5
23	Roland Schoeman	South Africa	48.69	22	1
24	Norbert Trandafir	Romania	48.75	20	0	NR
25	Nabil Kebbab	Algeria	48.76	22	2
26	George Bovell	Trinidad and Tobago	48.82	20	8	NR
27	Paulius Viktoravičius	Lithuania	48.84	19	7	NR
28	Adam Brown	Great Britain	48.90	22	0
29	Nimrod Shapira Bar-Or	Israel	48.93	19	3	NR
30	Alexei Puninski	Croatia	49.08	18	6
31	Sebastiaan Verschuren	Netherlands	49.12	21	0
32	Jason Dunford	Kenya	49.16	22	8
33	Dominik Meichtry	Switzerland	49.17	20	7
33	Albert Subirats	Venezuela	49.17	21	9
35	Flori Lang	Switzerland	49.20	20	9
36	Mindaugas Sadauskas	Lithuania	49.26	16	5
37	Rammaru Harada	Japan	49.28	19	1
38	David Dunford	Kenya	49.34	14	3
39	Jacinto Ayala	Dominican Republic	49.38	11	7	NR
40	Martin Verner	Czech Republic	49.39	22	9
41	Jakob Andkjær	Denmark	49.43	18	4
41	Chen Zuo	China	49.43	20	1
43	Petter Stymne	Sweden	49.47	19	2
44	Ryan Harrison	Ireland	49.49	17	8	NR
45	Alexandre Agostinho	Portugal	49.50	18	2
46	Romāns Miloslavskis	Latvia	49.51	17	9
46	Yoshihiro Okumura	Japan	49.51	19	0
48	Douglas Clark Lennox II	Puerto Rico	49.62	10	3
48	Cai Li	China	49.62	19	6
50	Yoris Grandjean	Belgium	49.75	21	8
51	Barry Murphy	Ireland	49.76	16	3
52	Andrei Radzionau	Belarus	49.90	18	0
53	Ioannis Kalargaris	Greece	49.92	18	1
54	Ryan John Pini	Papua New Guinea	49.94	18	7
55	Marcin Tarczyński	Poland	49.97	19	8
56	Paulo Santos	Portugal	50.01	16	7
56	Roberto Gómez	Venezuela	50.01	17	3
58	Andrii Hovorov	Ukraine	50.04	17	6
59	Virdhawal Khade	India	50.07	19	9
60	Martín Kutscher	Uruguay	50.19	18	9
61	Dmytro Cherkasov	Ukraine	50.22	1	3
62	Alexandre Bakhtiarov	Cyprus	50.30	15	2
63	Emil Dall-Nielsen	Denmark	50.32	17	1
64	Glenn Surgeloose	Belgium	50.37	17	7
65	Mario Montoya	Costa Rica	50.40	13	2	NR
66	Jose Antonio Alonso	Spain	50.41	18	8
67	Martin Spitzer	Austria	50.43	15	8
68	Andrejs Dūda	Latvia	50.45	14	6
69	Dominik Koll	Austria	50.48	17	5
70	Vlad Razvan Caciuc	Romania	50.51	15	4
71	Daniil Tulupov	Uzbekistan	50.60	14	5
72	Kaan Tayla	Turkey	50.62	17	2
73	Raúl Martínez Colomer	Puerto Rico	50.65	15	3
74	Alex Villaecija	Spain	50.66	16	6
75	Vladimir Sidorkin	Estonia	50.71	17	4
76	Zoltan Povazsay	Hungary	50.73	17	0
77	Julio Galofre	Colombia	50.80	16	1
78	Daniel Bego	Malaysia	50.86	13	6
78	Doğa Çelik	Turkey	50.86	16	0
80	Elvis Burrows	Bahamas	50.88	12	2	NR
81	Artur Dilman	Kazakhstan	50.88	16	2
82	Terrence Haynes	Barbados	50.95	16	4
83	Juan Cambindo Romanos	Colombia	50.96	14	4
83	Raphaël Stacchiotti	Luxembourg	50.96	16	8
85	Aleksandar Nikolov	Bulgaria	50.98	12	7
86	Martyn Forde	Barbados	51.01	15	9
87	Hajder Ensar	Bosnia and Herzegovina	51.08	14	7
88	Branden Whitehurst	Virgin Islands	51.27	11	3	NR
89	Mohammad Bidarian	Iran	51.31	11	5
90	Bae Joonmo	South Korea	51.54	12	3
90	Sebastián Jahnsen Madico	Peru	51.54	14	1
92	Pasha Vahdati Rad	Iran	51.65	8	4
93	Roy-Allan Burch	Bermuda	51.68	12	8	NR
93	Danil Haustov	Estonia	51.68	16	9
95	Foo Jian Beng	Malaysia	51.71	15	5
96	Vasilii Danilov	Kyrgyzstan	51.81	15	6
97	Tan Xue Wei Nicholas	Singapore	51.83	13	8
98	Sebastian Arispe Silva	Peru	51.85	14	8
99	Jean-François Schneiders	Luxembourg	51.86	13	5
99	Květoslav Svoboda	Czech Republic	51.86	15	0
101	Jani Rusi	Finland	51.88	14	9
102	Charles William Walker	Philippines	51.92	13	0
103	Lim Clement	Singapore	52.11	12	4
104	Mikael Koloyan	Armenia	52.12	13	4
105	Cheah Geoffrey Robin	Hong Kong	52.14	13	1
106	Miguel Nesrala	Dominican Republic	52.21	12	0
107	Grant Beahan	Zimbabwe	52.23	14	2
108	Petr Romashkin	Uzbekistan	52.26	13	3
109	José Alberto Montoya	Costa Rica	52.31	11	8
110	Brad Hamilton	Jamaica	52.37	9	0
111	Mohammad Madwa	Kuwait	52.40	15	1
112	Christopher Duenas	Guam	52.45	12	5
113	Nicholas Thomson	Bermuda	52.47	9	4
114	Norbert Trudman	Slovakia	52.51	14	0
115	Sidni Hoxha	Albania	52.54	11	1
115	Glenn Victor Sutanto	Indonesia	52.54	13	9
117	Kang Yonghwan	South Korea	52.62	10	1
118	Kouam Amine	Morocco	52.64	11	4
119	Kendrick Uy	Philippines	52.67	12	6
120	Luke Hall	Eswatini	52.79	11	0
121	Salvador Mallat Arcaya	Chile	52.86	9	6
122	Zane Jordan	Zambia	52.92	10	4
123	Abdoul Khadre Mbaye Niane	Senegal	52.96	10	7
124	Yan Ho Chun	Hong Kong	52.97	11	2
125	Joao Matias	Angola	52.99	9	1
126	Rodion Davelaar	Netherlands Antilles	53.00	12	9
127	Serghei Golban	Moldova	53.04	11	9
128	Endi Babi	Albania	53.07	10	9
129	Fernando Castellanos	Guatemala	53.19	8	0
130	Iuri Iazadji	Moldova	53.26	12	1
131	Bojan Jovanov	Macedonia	53.27	1	6
132	Sergej Naumovski	Macedonia	53.30	1	1
133	Jonathan Wong	Jamaica	53.35	9	5
134	Ashwin Menon	India	53.41	9	8
135	Hycinth Cijntje	Netherlands Antilles	53.46	8	5
136	Alexander Ray	Namibia	53.61	7	6
137	Matar Samb	Senegal	53.71	10	2
138	Humoud Alhumoud	Kuwait	53.72	13	7
139	Achelhi Bilal	Morocco	53.86	9	2
140	Rony Bakale	Congo	53.92	8	2
141	Kareem Ennab	Jordan	53.97	9	9
142	Lao Kuan Fong	Macau	54.11	9	3
143	Allan Gutiérrez Castro	Honduras	54.16	8	6
144	Yellow Yeiyah	Nigeria	54.17	7	1
145	Samson Opuakpo	Nigeria	54.28	6	6
146	Abbas Raad	Lebanon	54.32	11	6
147	Harutyun Harutyunyan	Armenia	54.39	8	3
148	Saeed Al Jesmi	United Arab Emirates	54.76	7	4
149	Timothy Ferris	Zimbabwe	54.78	10	8
150	Mohammed Al Ghaferi	United Arab Emirates	54.83	8	8
151	Vincent Perry	Tahiti	54.88	7	8
152	Colin Bensadon	Gibraltar	54.94	6	3
153	Jean Hugues Gregoire	Mauritius	54.96	7	5
154	Julien Brice	Saint Lucia	55.00	5	1
155	Niall Christopher Roberts	Guyana	55.08	6	4
156	Andrey Molchanov	Turkmenistan	55.30	6	7
157	Gary Pineda	Guatemala	55.34	6	1
158	Tsung Chao-Lin	Chinese Taipei	55.40	9	7
159	Rashid Iunusov	Kyrgyzstan	55.45	10	0
160	Esau Simpson	Grenada	55.59	6	8
161	Moh'D Aqelah	Jordan	55.74	8	7
162	Edward Caruana Dingli	Malta	55.75	6	5
163	Ignacio Quevedo Bubba	Bolivia	55.95	5	3
164	Nicholas Coard	Grenada	55.99	5	6
165	Ronny Vencatachellum	Mauritius	56.00	7	0
166	Ahmed Jebrel	Palestine	56.05	8	1
167	Shane Mangroo	Seychelles	56.15	4	2
167	Anthony Clark	Tahiti	56.15	8	9
169	Patricio Vera	Mozambique	56.29	5	2
170	Sergeý Krowýakow	Turkmenistan	56.59	5	5
171	Peter Popahun Pokawin	Papua New Guinea	56.97	4	5
172	Chong Cheok Kuan	Macau	57.35	6	2
173	Douglas Miller	Fiji	57.43	5	8
174	Juan Carlos Sikaffy Diaz	Honduras	57.52	6	0
175	Elaijie Erasito	Fiji	57.64	5	9
176	Siu Kent Chung	Brunei	57.96	5	0
177	Omar Jasam	Bahrain	58.38	6	9
178	Jesse Nilon	Samoa	58.56	4	4
179	Quenton Dupont	Eswatini	58.69	4	3
180	Ahmed Salam Ali Al-Dulaimi	Iraq	58.91	2	5
181	Adama Ouedraogo	Burkina Faso	59.11	1	8
182	Michael Taylor	Marshall Islands	59.24	4	1
183	Jake Villarreal	Marshall Islands	59.39	4	8
184	Mark Paul Thompson	Zambia	59.84	3	3
185	Edward Poppe	Guam	1:00.05	4	6
186	Adam Viktora	Seychelles	1:00.17	3	2
187	Shailesh Shumsher Rana	Nepal	1:00.74	4	0
188	Fabian Gregory Binns	Guyana	1:01.05	1	4
189	Sufyan Almalki	Bahrain	1:01.25	3	1
190	Cooper Graf	Northern Mariana Islands	1:01.30	3	4
191	Shin Kimura	Northern Mariana Islands	1:01.86	3	5
192	Wei Ching Maou	American Samoa	1:02.50	2	4
193	Shameel Ibrahim	Maldives	1:02.64	3	7
194	Prasiddha Jung Shah	Nepal	1:02.68	3	6
195	Ali Mohamed Raaidh	Maldives	1:02.74	4	9
196	Samson Makere	Tanzania	1:07.24	2	6
196	Koang Gatkos Gor	Ethiopia	1:07.24	3	0
198	Kwizera Cedric	Burundi	1:08.71	3	8
199	Barouf Ali	Comoros	1:10.00	2	7
200	Nsumizi Alain Boris	Burundi	1:12.70	3	9
201	Kokou Messan Amegashie	Togo	1:14.79	2	9
202	Mohamed Bourhanta	Djibouti	1:16.67	2	1
–	Lansana Sidibe	Guinea	DNS	1	2
–	Itai Chammah	Israel	DNS	1	5
–	Aiah Emerson Mansa Musai	Sierra Leone	DNS	1	7
–	Mamadou Cisse	Guinea	DNS	2	2
–	Leonel Matonse	Mozambique	DNS	7	9
–	Saif Alaslam Saeed Al-Saadi	Iraq	DSQ	2	3
–	Fernando Medrano	Nicaragua	DSQ	7	2
–	Omar Núñez	Nicaragua	DSQ	7	3
–	Alexandr Sklyar	Kazakhstan	DSQ	15	7

Rank	Name	Nationality	Time	Heat	Lane	Notes
1	Alain Bernard	France	47.27	1	5
2	César Cielo	Brazil	47.48	1	6
3	Stefan Nystrand	Sweden	47.53	1	4
4	Nicolas Oliveira	Brazil	47.78	1	7
5	Brent Hayden	Canada	47.88	2	3
6	David Walters	USA	47.92	2	4
7	Lyndon Ferns	South Africa	47.96	2	5
8	Frédérick Bousquet	France	47.98	1	3
9	Filippo Magnini	Italy	48.04	2	1	NR
10	Nathan Adrian	USA	48.13	1	2
11	Matt Targett	Australia	48.15	1	1
12	Andrey Grechin	Russia	48.18	2	2
13	Evgeniy Lagunov	Russia	48.20	2	6
14	Konrad Czerniak	Poland	48.22	2	8
15	Duje Draganja	Croatia	48.25	2	7
16	Joel Greenshields	Canada	48.73	1	8

Rank	Name	Nationality	Lane	Time	Notes
	César Cielo Filho	Brazil	5	46.91	WR
	Alain Bernard	France	4	47.12	ER
	Frédérick Bousquet	France	8	47.25
4	Brent Hayden	Canada	2	47.27	NR
5	David Walters	United States	7	47.33	NR
6	Stefan Nystrand	Sweden	3	47.37	NR
7	Lyndon Ferns	South Africa	1	47.94
8	Nicolas Oliveira	Brazil	6	48.01

• Swimming at the 2007 World Aquatics Championships – Men's 100 metre freestyle
• Swimming at the 2008 Summer Olympics – Men's 100 metre freestyle

• Worlds 2009 results: Men's 100m Free Heats, from OmegaTiming.com (official timer of the 2009 Worlds); retrieved 2009-07-30.
• Worlds 2009 results: Men's 100m Free Semifinals, from OmegaTiming.com (official timer of the 2009 Worlds); retrieved 2009-07-30.
• Worlds 2009 results: Men's 100m Free Finals, from OmegaTiming.com (official timer of the 2009 Worlds); retrieved 2009-07-30.