Sergei Mamchur

{{short description|Russian footballer}}

{{More citations needed|date=August 2020}}

{{Use dmy dates|date=November 2021}}

{{Infobox football biography

| name = Sergei Mamchur

| image =

| fullname = Sergei Nikolaevich Mamchur

| birth_date = {{birth date|df=yes|1972|02|03}}

| birth_place = Dnipropetrovsk, Ukrainian SSR

| death_date = {{death date and age|df=yes|1997|12|26|1972|02|03}}

| death_place = Moscow, Russia

| height = {{Height|m=1.79|precision=0}}

| position = Defender

| youthyears1 = | youthclubs1 = Dnipro-75 Dnipropetrovsk

| years1 = 1988–1992 | clubs1 = Dnipro Dnipropetrovsk | caps1 = 37 | goals1 = 0

| years2 = 1992 | clubs2 = Asmaral Moscow | caps2 = 3 | goals2 = 0

| years3 = 1993–1997 | clubs3 = CSKA Moscow | caps3 = 112 | goals3 = 12

| nationalyears1 = 1991 | nationalteam1 = USSR U20

| nationalyears2 = 1992–1994 | nationalteam2 = Russia U21

| nationalcaps1 =

| nationalgoals1 =

| medaltemplates =

{{Medal|Sport|Men's football}}

{{Medal|Country|{{fb|URS}}}}

{{Medal|Comp|FIFA World Youth Championship}}

{{Medal|B|1991 Portugal|}}

{{Medal|Comp|UEFA European Under-18 Championship}}

{{Medal|W|1990 Hungary|}}

}}

Sergei Nikolaevich Mamchur ({{langx|ru|Серге́й Николаевич Мамчур}}; 3 February 1972 – 26 December 1997) was a Russian football defender.