| | Event type

100 metres Butterfly, Women

Date	20 – 21 October 1968
Status	Olympic
Location	Alberca Olímpica Francisco Márquez, Ciudad de México
Participants	28 from 21 countries

Dutchwoman Ada Kok had finished second in this event in 1964, was the 1966 European Champion, and had held the world record since 1965. Australian put forward the unknown Lyn McClements who had been a freestyler until the Olympic year and had never won a butterfly race until the Australian Trials in February 1968. American Ellie Daniel had won the 1967 Pan American Games and the 1968 US Olympic Trials and was expected to contend. McClements started the final quickly, leading by half a body length at the turn over American Susan Shields, with Kok in third and Daniel fourth. McClements hung on over the last lap and won a surprise gold medal, with Daniel moving up for silver and Shields taking bronze, Kok finishing fourth.

Pos	Number	Competitor	NOC	R1	SF	Final
1	13062	Lyn McClements	AUS	1:06.1 (1 h3)	1:06.1 (2 h2)	1:05.5 (1)	Gold
2	15381	Ellie Daniel	USA	1:07.2 (1 h2)	1:06.1 (1 h2)	1:05.8 (2)	Silver
3	15396	Susan Shields	USA	1:06.2 (1 h5)	1:06.3 (2 h1)	1:06.2 (3)	Bronze
4	17070	Ada Kok	NED	1:08.5 (2 h1)	1:06.2 (1 h1)	1:06.2 (4)
5	–	Andrea Gyarmati	HUN	1:07.4 (2 h3)	1:06.6 (3 h1)	1:06.8 (5)
6	12333	Heike Hustede	FRG	1:07.7 (1 h1)	1:07.0 (4 h1)	1:06.9 (6)
7	15386	Toni Hewitt	USA	1:08.1 (2 h4)	1:07.9 (5 h1)	1:07.5 (7)
8	–	Helga Lindner	GDR	1:08.0 (1 h4)	1:07.7 (3 h2)	1:07.6 (8)
9	23077	Christine Strübing	GDR	1:09.2 (3 h2)	1:08.2 (6 h1)	–
10	21056	Tatyana Devyatova	URS	1:07.6 (2 h2)	1:08.4 (4 h2)	–
11	17071	Nel Bos	NED	1:09.5 (4 h2)	1:08.5 (5 h2)	–
12	19367	Sandra Whittleston	NZL	1:08.5 (2 h5)	1:08.7 (6 h2)	–
13	16699	Margaret Auton	GBR	1:08.5 (3 h4)	1:08.8 (7 h2)	–
14	18160	Yasuko Fujii	JPN	1:10.1 (4 h1)	1:09.4 (8 h2)	–
15	13887	Jeanne Warren	CAN	1:10.0 (3 h1)	1:09.7 (7 h1)	–
16	16701	Gillian Treers	GBR	1:10.6 (3 h5)	1:10.6 (8 h1)	–
17	13886	Marilyn Corson	CAN	1:10.7 (4 h5)	–	–
18	23709	Oei Liana	TPE	1:11.2 (5 h2)	–	–
19	17704	Yvonne Tobis	ISR	1:12.0 (3 h3)	–	–
20	18781	Patricia Obregón	MEX	1:12.4 (5 h1)	–	–
21	17636	Vivienne Smith	IRL	1:13.1 (6 h2)	–	–
22	13060	Pauline Gray	AUS	1:13.5 (5 h5)	–	–
23	16248	Catherine Grosjean	FRA	1:14.6 (7 h2)	–	–
24	13979	Carmen Gómez	COL	1:14.7 (4 h4)	–	–
25	21521	Ruth Apt	URU	1:15.3 (5 h4)	–	–
26	12810	Adriana Comolli	ARG	1:16.5 (6 h5)	–	–
27	14096	Nam Sang-Nam	KOR	1:16.9 (6 h1)	–	–
28	22935	Ana Marcial	PUR	1:17.1 (6 h4)	–	–
DNS	13885	Elaine Tanner	CAN	– (DNS h1)	–	–
DNS	17381	Edit Kovács	HUN	– (DNS h3)	–	–
DNS	15889	Hedy García	PHI	– (DNS h3)	–	–
DNS	22933	Kristina Moir	PUR	– (DNS h5)	–	–
DNS	20262	Pat Chan	SGP	– (DNS h3)	–	–
DNS	–	Lotten Andersson	SWE	– (DNS h4)	–	–
DNS	20394	Ingrid Gustavsson	SWE	– (DNS h3)	–	–

Round One

Date	20 October 1968 — 10:00
Format	Fastest 16 advanced to the semi-finals.

Pos	Lane	Competitor	NOC	Time
1	–	Lyn McClements	AUS	1:06.1	Q
2	–	Susan Shields	USA	1:06.2	Q
3	–	Ellie Daniel	USA	1:07.2	Q
4	–	Andrea Gyarmati	HUN	1:07.4	Q
5	–	Tatyana Devyatova	URS	1:07.6	Q
6	–	Heike Hustede	FRG	1:07.7	Q
7	–	Helga Lindner	GDR	1:08.0	Q
8	–	Toni Hewitt	USA	1:08.1	Q
=9	–	Ada Kok	NED	1:08.5	Q
=9	–	Margaret Auton	GBR	1:08.5	Q
=9	–	Sandra Whittleston	NZL	1:08.5	Q
12	–	Christine Strübing	GDR	1:09.2	Q
13	–	Nel Bos	NED	1:09.5	Q
14	–	Jeanne Warren	CAN	1:10.0	Q
15	–	Yasuko Fujii	JPN	1:10.1	Q
16	–	Gillian Treers	GBR	1:10.6	Q
17	–	Marilyn Corson	CAN	1:10.7
18	–	Oei Liana	TPE	1:11.2
19	–	Yvonne Tobis	ISR	1:12.0
20	–	Patricia Obregón	MEX	1:12.4
21	–	Vivienne Smith	IRL	1:13.1
22	–	Pauline Gray	AUS	1:13.5
23	–	Catherine Grosjean	FRA	1:14.6
24	–	Carmen Gómez	COL	1:14.7
25	–	Ruth Apt	URU	1:15.3
26	–	Adriana Comolli	ARG	1:16.5
27	–	Nam Sang-Nam	KOR	1:16.9
28	–	Ana Marcial	PUR	1:17.1
DNS	–	Elaine Tanner	CAN	–
DNS	–	Edit Kovács	HUN	–
DNS	–	Hedy García	PHI	–
DNS	–	Pat Chan	SGP	–
DNS	–	Ingrid Gustavsson	SWE	–
DNS	–	Lotten Andersson	SWE	–
DNS	–	Kristina Moir	PUR	–

Heat #1

Pos	Lane	Competitor	NOC	Time
1	–	Heike Hustede	FRG	1:07.7	Q
2	–	Ada Kok	NED	1:08.5	Q
3	–	Jeanne Warren	CAN	1:10.0	Q
4	–	Yasuko Fujii	JPN	1:10.1	Q
5	–	Patricia Obregón	MEX	1:12.4
6	–	Nam Sang-Nam	KOR	1:16.9
DNS	–	Elaine Tanner	CAN	–

Heat #2

Pos	Lane	Competitor	NOC	Time
1	–	Ellie Daniel	USA	1:07.2	Q
2	–	Tatyana Devyatova	URS	1:07.6	Q
3	–	Christine Strübing	GDR	1:09.2	Q
4	–	Nel Bos	NED	1:09.5	Q
5	–	Oei Liana	TPE	1:11.2
6	–	Vivienne Smith	IRL	1:13.1
7	–	Catherine Grosjean	FRA	1:14.6

Heat #3

Pos	Lane	Competitor	NOC	Time
1	–	Lyn McClements	AUS	1:06.1	Q
2	–	Andrea Gyarmati	HUN	1:07.4	Q
3	–	Yvonne Tobis	ISR	1:12.0
DNS	–	Edit Kovács	HUN	–
DNS	–	Hedy García	PHI	–
DNS	–	Pat Chan	SGP	–
DNS	–	Ingrid Gustavsson	SWE	–

Heat #4

Pos	Lane	Competitor	NOC	Time
1	–	Helga Lindner	GDR	1:08.0	Q
2	–	Toni Hewitt	USA	1:08.1	Q
3	–	Margaret Auton	GBR	1:08.5	Q
4	–	Carmen Gómez	COL	1:14.7
5	–	Ruth Apt	URU	1:15.3
6	–	Ana Marcial	PUR	1:17.1
DNS	–	Lotten Andersson	SWE	–

Heat #5

Pos	Lane	Competitor	NOC	Time
1	–	Susan Shields	USA	1:06.2	Q
2	–	Sandra Whittleston	NZL	1:08.5	Q
3	–	Gillian Treers	GBR	1:10.6	Q
4	–	Marilyn Corson	CAN	1:10.7
5	–	Pauline Gray	AUS	1:13.5
6	–	Adriana Comolli	ARG	1:16.5
DNS	–	Kristina Moir	PUR	–

Semi-Finals

Date	20 October 1968 — 10:00
Format	Fastest eight advanced to the final.

Pos	Lane	Competitor	NOC	Time
=1	–	Ellie Daniel	USA	1:06.1	Q
=1	–	Lyn McClements	AUS	1:06.1	Q
3	–	Ada Kok	NED	1:06.2	Q
4	–	Susan Shields	USA	1:06.3	Q
5	–	Andrea Gyarmati	HUN	1:06.6	Q
6	–	Heike Hustede	FRG	1:07.0	Q
7	–	Helga Lindner	GDR	1:07.7	Q
8	–	Toni Hewitt	USA	1:07.9	Q
9	–	Christine Strübing	GDR	1:08.2
10	–	Tatyana Devyatova	URS	1:08.4
11	–	Nel Bos	NED	1:08.5
12	–	Sandra Whittleston	NZL	1:08.7
13	–	Margaret Auton	GBR	1:08.8
14	–	Yasuko Fujii	JPN	1:09.4
15	–	Jeanne Warren	CAN	1:09.7
16	–	Gillian Treers	GBR	1:10.6

Heat #1

Pos	Lane	Competitor	NOC	Time
1	–	Ada Kok	NED	1:06.2	Q
2	–	Susan Shields	USA	1:06.3	Q
3	–	Andrea Gyarmati	HUN	1:06.6	Q
4	–	Heike Hustede	FRG	1:07.0	Q
5	–	Toni Hewitt	USA	1:07.9	Q
6	–	Christine Strübing	GDR	1:08.2
7	–	Jeanne Warren	CAN	1:09.7
8	–	Gillian Treers	GBR	1:10.6

Heat #2

Pos	Lane	Competitor	NOC	Time
1	–	Ellie Daniel	USA	1:06.1	Q
2	–	Lyn McClements	AUS	1:06.1	Q
3	–	Helga Lindner	GDR	1:07.7	Q
4	–	Tatyana Devyatova	URS	1:08.4
5	–	Nel Bos	NED	1:08.5
6	–	Sandra Whittleston	NZL	1:08.7
7	–	Margaret Auton	GBR	1:08.8
8	–	Yasuko Fujii	JPN	1:09.4

Final Round

Date	21 October 1968 — 17:00

Pos	Lane	Competitor	NOC	Time
1	–	Lyn McClements	AUS	1:05.5
2	–	Ellie Daniel	USA	1:05.8
3	–	Susan Shields	USA	1:06.2
4	–	Ada Kok	NED	1:06.2
5	–	Andrea Gyarmati	HUN	1:06.8
6	–	Heike Hustede	FRG	1:06.9
7	–	Toni Hewitt	USA	1:07.5
8	–	Helga Lindner	GDR	1:07.6