Ahn Sun-ju

{{Infobox golfer

| name = Ahn Sun-ju

| image =

| imagesize =

| caption =

| fullname = Sun-ju Ahn

| nickname = Big Mama

| birth_date = {{birth date and age|1987|8|31|df=yes}}

| birth_place = Gwangju, Gyeonggi-do, South Korea

| death_date =

| death_place =

| height = {{height|ft=5|in=3}}

| weight =

| nationality = {{KOR}}

| residence =

| spouse = Kim Sung-ho

| partner =

| children =

| college =

| yearpro = 2006

| tour = LPGA of Japan Tour (joined 2010)

| extour = LPGA of Korea Tour (joined 2006)

| prowins = 35

| lpgawins = 1

| jlpgawins = 28

| klpgawins = 7

| lagtwins =

| majorwins =

| nabisco = CUT: 2008

| lpga = DNP

| wusopen = T13: 2009

| wbritopen = T9: 2014

| evian = DNP

| wghofid =

| wghofyear =

| award1 = LPGA of Japan Tour
Player of the Year

| year1 = 2010, 2011, 2014

| award2 = LPGA of Japan Tour
leading money winner

| year2 = 2010, 2011, 2014, 2018

| award3 = LPGA of Japan Tour
Rookie of the Year

| year3 = 2010

| awardssection =

}}

{{Infobox Korean name

| hangul = 안선주

| hanja = 安宣柱

| rr = An Seonju

| mr = An Sŏnju

| context =

| image =

| caption =

}}

Ahn Sun-ju, or Sun-ju Ahn ({{langx|ko|안선주}}, born 31 August 1987) is a South Korean professional golfer currently playing on the LPGA of Japan Tour. She led the LPGA of Japan Tour money list in 2010, 2011, 2014, and 2018.

Professional wins (35)

=LPGA Tour wins (1)=

class="wikitable" style="font-size:95%;"

!No.

!Date

!Tournament

!Winning score

!Margin of
victory

!Runners-up

1

|8 Nov 2015

|Toto Japan Classic^

|−16 (68-65-67=200)

|Playoff

|{{flagicon|KOR}} Lee Ji-hee
{{flagicon|USA}} Angela Stanford

^ Co-sanctioned with the LPGA of Japan Tour

LPGA Tour playoff record (1–0)

class="wikitable" style="font-size:95%;"

!No.!!Year!!Tournament!!Opponents!!Result

style="background:#B0E0E6;"

|align=center|1

|2015

|Toto Japan Classic

|{{flagicon|KOR}} Lee Ji-hee
{{flagicon|USA}} Angela Stanford

|Won with birdie on first extra hole

=LPGA of Korea Tour wins (7)=

class="wikitable" style="font-size:95%;"

!No.

!Date

!Tournament

!Winning score

!Margin of
victory

!Runner(s)-up

1

|13 May 2006

|KB Star Tour First Tourney in Yongin

|−16 (65-66-69=200)

|1 stroke

|{{flagicon|KOR}} Na Yeon Choi

2

|21 Apr 2007

|KB Star Tour First Tourney in Busan

| +4 (68-76-76=220)

|1 stroke

|{{flagicon|KOR}} Moon Hyun-hee
{{flagicon|KOR}} Hong Ran
{{flagicon|KOR}} Jiyai Shin

3

|20 May 2007

|Taeyoung Cup Korea Women's Open

|−4 (73-69-70=212)

|4 strokes

|{{flagicon|KOR}} Jung Jae-eun
{{flagicon|KOR}} Eun-Hee Ji
{{flagicon|USA}} Cristie Kerr

4

|6 Jul 2007

|MBC Tour Korea Golf Art Village Open

|−12 (69-63=132)

|1 stroke

|{{flagicon|KOR}} Eun-Hee Ji

5

|3 Oct 2008

|Samsung Finance Ladies Championship

|−10 (65-69-72=206)

|2 strokes

|{{flagicon|KOR}} Yoon Chae-young

6

|10 May 2009

|KB Star Tour First Tourney in Hampyeong

|−12 (68-66-70=204)

|6 strokes

|{{flagicon|KOR}} Hee Kyung Seo

7

|6 Sep 2009

|KB Star Tour Second Tourney in Kyeongsan

|−17 (68-66-66=202)

|3 strokes

|{{flagicon|KOR}} Song Min-ji

=LPGA of Japan Tour wins (28)=

class="wikitable" style="font-size:95%;"

!No.

!Date

!Tournament

!Winning score

!Margin of
victory

!Runner(s)-up

1

|8 Mar 2010

|Daikin Orchid Ladies

|−10 (69-70-67=206)

|5 strokes

|{{flagicon|JPN}} Kaori Aoyama
{{flagicon|JPN}} Chie Arimura
{{flagicon|JPN}} Shinobu Moromizato
{{flagicon|KOR}} Inbee Park
{{flagicon|KOR}} Jiyai Shin

2

|18 Jul 2010

|Stanley Ladies

|−6 (70-71-69=210)

|Playoff

|{{flagicon|KOR}} Lee Ji-hee

3

|10 Oct 2010

|Sankyo Ladies Open

|−10 (69-70-67=206)

|Playoff

|{{flagicon|KOR}} Inbee Park

4

|17 Oct 2010

|Fujitsu Ladies

|−19 (65-62-70=207)

|7 strokes

|{{flagicon|KOR}} Jiyai Shin

5

|8 May 2011

|World Ladies Championship Salonpas Cup

|−10 (71-67-71-69=278)

|3 strokes

|{{flagicon|TWN}} Teresa Lu
{{flagicon|JPN}} Miki Saiki

6

|12 Jun 2011

|Suntory Ladies Open

|−14 (67-70-67-70=274)

|1 stroke

|{{flagicon|JPN}} Chie Arimura
{{flagicon|KOR}} Lee Ji-hee

7

|14 Aug 2011

|NEC Karuizawa 72

|−16 (68-66-66=200)

|Playoff

|{{flagicon|JPN}} Akiko Fukushima

8

|9 Oct 2011

|Sankyo Ladies Open

|−9 (71-66-70=207)

|2 strokes

|{{flagicon|KOR}} Lee Ji-woo
{{flagicon|KOR}} Jeon Mi-jeong
{{flagicon|JPN}} Shiho Oyama

9

|6 May 2012

|World Ladies Championship Salonpas Cup

|−8 (67-69-72=208)

|Playoff

|{{flagicon|KOR}} Inbee Park
{{flagicon|USA}} Morgan Pressel

10

|26 Aug 2012

|Nitori Ladies

|−14 (71-63-68=202)

|2 strokes

|{{flagicon|KOR}} Jeon Mi-jeong

11

|2 Sep 2012

|Golf5 Ladies

|−15 (67-68-66=201)

|1 stroke

|{{flagicon|KOR}} Lee Ji-hee

12

|25 Aug 2013

|CAT Ladies

|−12 (70-68-60=198)

|3 strokes

|{{flagicon|JPN}} Ritsuko Ryu

13

|1 Sep 2013

|Nitori Ladies Golf Tournament

|−11 (70-70-65=205)

|2 strokes

|{{flagicon|TWN}} Teresa Lu

14

|6 April 2014

|Yamaha Ladies Open Katsuragi

|−5 (70-69-72-72=283)

|1 stroke

|{{flagicon|JPN}} Yumiko Yoshida

15

|25 May 2014

|Chukyo TV Bridgestone Ladies Open

|−8 (69-69-70=208)

|3 strokes

|{{flagicon|KOR}} Lee Ji-hee
{{flagicon|JPN}} Sakai Miki
{{flagicon|JPN}} Ritsuko Ryu
{{flagicon|JPN}} Miki Saiki
{{flagicon|ROC}} Phoebe Yao
{{flagicon|JPN}} Sakura Yokomine

16

|15 Jun 2014

|Suntory Ladies Open

|−14 (69-71-68-66=274)

|5 strokes

|{{flagicon|JPN}} Akane Iijima

17

|12 Oct 2014

|Stanley Ladies Golf Tournament

|−14 (68-68-66=202)

|2 strokes

|{{flagicon|KOR}} Lee Ji-hee