:Franz Islacker

{{Short description|German footballer (1926–1970)}}

{{Use dmy dates|date=September 2023}}

{{Infobox football biography

| name = Franz Islacker

| image =

| full_name =

| birth_date = {{Birth date|1926|2|3|df=y}}

| birth_place = Essen, Germany

| death_date = {{Death date and age|1970|7|1|1926|2|3|df=y}}

| death_place =

| height =

| position = Forward

| youthyears1 =

| youthclubs1 =

| years1 = 1945–1949

| clubs1 = TuS Helene Altenessen

| years2 = 1949–1950

| clubs2 = VfR Mannheim

| years3 = 1950–1952

| clubs3 = Rheydter SV

| years4 = 1952–1961

| clubs4 = Rot-Weiss Essen

| nationalyears1 = 1954

| nationalteam1 = West Germany

| nationalcaps1 = 1

| nationalgoals1 = 0

}}

Franz Islacker (3 February 1926 – 1 July 1970) was a German footballer who played who played as a forward. He is most notable for scoring a hat-trick for Rot-Weiss Essen in the final of the 1955 German football championship against Kaiserslautern. He was the father of Frank Islacker and the grandfather of Mandy Islacker.