Hong Si-hoo

{{short description|South Korean footballer (born 2001)}}

{{family name hatnote|Hong||lang=Korean}}

{{Use British English|date=May 2020}}

{{Use dmy dates|date=May 2020}}

{{Infobox football biography

| name = Hong Si-hoo

| image =

| image_size =

| caption =

| fullname = Hong Si-hoo

| birth_date = {{birth date and age|2001|1|8|df=y}}

| birth_place = Seoul, South Korea

| height = 1.75 m{{cite web |title=인천유나이티드 |url=https://www.incheonutd.com/player/pro_view.php?p_idx=739 |website=Incheon United |access-date=26 October 2022 |archive-url=https://web.archive.org/web/20220221133624/https://www.incheonutd.com/player/pro_view.php?p_idx=739 |archive-date=21 February 2022 |language=ko |url-status=live}}

| position = Forward

| currentclub = Incheon United

| clubnumber = 37

| youthyears1 = 2012–2013

| youthclubs1 = Seoul Dongmyeong Elementary School

| youthyears2 = 2014–2016

| youthclubs2 = Cheonan Football Center

| youthyears3 = 2017–2019

| youthclubs3 = Sangmoon High School

| years1 = 2020–2021

| clubs1 = Seongnam FC

| caps1 = 37

| goals1 = 1

| years2 = 2022–

| clubs2 = Incheon United

| caps2 = 48

| goals2 = 3

| nationalyears1 = 2022–

| nationalteam1 = South Korea U23

| nationalcaps1 = 6

| nationalgoals1 = 2

| club-update = 11 June 2023 (UTC)

| nationalteam-update = 29 March 2023 (UTC)

}}

Hong Si-hoo ({{ko-hhrm|홍시후; born 8 January 2001}}) is a South Korean professional footballer who plays as a midfielder for K League 1 side Incheon United.