Hendrik Johannes "Hennie" Otto (born 25 June 1976) is a South African professional golfer.

Otto was born in Boksburg.

Otto earned a place on the European Tour for 2000 by graduating from the Challenge Tour, but struggled to establish himself on the tour. In 2003, while splitting time between the European and Challenge Tours, he finished tied for tenth at The Open Championship in his major championship début and went on to finish 73rd in the European Tour Order of Merit. In 2008, again playing with limited European Tour status, he won the Italian Open and finished 37th on the Order of Merit. The win gave him full membership for the first time since 2004; this he maintained through the 2017 season, winning the 2011 South African Open Championship and the Italian Open again three years later.

Including the South African Open win, Otto has won 14 times on the Sunshine Tour since 1999.

No.	Date	Tournament	Winning score	Margin of victory	Runner-up
1	11 May 2008	Methorios Capital Italian Open	−25 (65-66-63-69=263)	1 stroke	Oliver Wilson
2	27 Nov 2011	SA Open Championship1	−14 (70-67-65-72=274)	1 stroke	Bernd Wiesberger
3	31 Aug 2014	Open d'Italia (2)	−20 (67-62-71-68=268)	2 strokes	David Howell

¹Co-sanctioned by the Sunshine Tour

European Tour playoff record (0–1)

No.	Year	Tournament	Opponent	Result
1	2008	Madeira Islands Open BPI - Portugal	Alastair Forsyth	Lost to birdie on first extra hole

No.	Date	Tournament	Winning score	Margin of victory	Runner(s)-up
1	8 May 1999	Pietersburg Classic	−17 (65-65-69=199)	4 strokes	Ashley Roestoff, Des Terblanche
2	12 Jun 1999	Vodacom Series (KwaZulu-Natal)	−11 (69-64-69=202)	4 strokes	Ashley Roestoff
3	11 May 2002	Limpopo Industrelek Classic	−14 (66-67-69=202)	1 stroke	Des Terblanche
4	24 Nov 2002	Nashua Masters	−1 (67-70-73-69=279)	1 stroke	Ciaran McMonagle, Gavin McNeill, Mark McNulty, Roger Wessels
5	2 Feb 2003	The Tour Championship	−17 (71-64-68-68=271)	2 strokes	Trevor Immelman
6	9 Sep 2005	Vodacom Origins of Golf at Erinvale	−14 (71-63-68=202)	1 stroke	Thomas Aiken
7	11 May 2007	Vodacom Origins of Golf (2) at Pretoria	−15 (67-65-69=201)	3 strokes	James Kamte
8	15 Nov 2009	MTC Namibia PGA Championship	−8 (72-70-72-66=280)	Playoff	Titch Moore
9	28 Feb 2010	Vodacom Championship (2)	−28 (65-61-67-67=260)	9 strokes	Jbe' Kruger
10	20 Feb 2011	Dimension Data Pro-Am	−16 (68-71-66-68=273)	4 strokes	James Kingston
11	1 Oct 2011	Platinum Classic	−17 (69-63-67=199)	2 strokes	Darren Fichardt
12	27 Nov 2011	SA Open Championship1	−14 (70-67-65-72=274)	1 stroke	Bernd Wiesberger
13	25 Oct 2019	Sibaya Challenge	−13 (69-66-62=197)	1 stroke	James Hart du Preez
14	2 Jun 2023	SunBet Challenge (Sun City)	−6 (71-72-67=210)	Playoff	Hayden Griffiths

¹Co-sanctioned by the European Tour

Sunshine Tour playoff record (2–2)

No.	Year	Tournament	Opponent(s)	Result
1	2009	MTC Namibia PGA Championship	Titch Moore	Won with par on first extra hole
2	2013	Investec Cup	Jaco van Zyl	Lost to par on first extra hole
3	2014	Lion of Africa Cape Town Open	Jaco Ahlers, Ross McGowan	Ahlers won with par on fourth extra hole Otto eliminated by par on first hole
4	2023	SunBet Challenge (Sun City)	Hayden Griffiths	Won with par on first extra hole

No.	Date	Tournament	Winning score	Margin of victory	Runner-up
1	10 Oct 1999	Philips Challenge Xacobeo 99	−10 (74-69-66-69=278)	Playoff	Pello Iguaran

Challenge Tour playoff record (1–0)

No.	Year	Tournament	Opponent	Result
1	1999	Philips Challenge Xacobeo 99	Pello Iguaran	Won with birdie on first extra hole

CUT = missed the half-way cut
"T" = tied
Note: Otto never played in the Masters Tournament or the U.S. Open.

"T" = Tied
Note that the HSBC Champions did not become a WGC event until 2009.

Amateur

• Eisenhower Trophy (representing South Africa): 1996

• Hennie Otto at the European Tour official site
• Hennie Otto at the Sunshine Tour official site
• Hennie Otto at the Official World Golf Ranking official site