The 2003–04 FIS Cross-Country World Cup was the 23rd official World Cup season in cross-country skiing for men and women.

The season began in Düsseldorf, Germany on 25 October 2003 and finished in Pragelato, Italy on 14 March 2004.

René Sommerfeldt of Germany won the overall men's cup,[1] and Gabriella Paruzzi of Italy won the women's.

[2] Pietro Piller Cottrer Peter Larsson Thobias Fredriksson Axel Teichmann Tobias Angerer Tor Arne Hetland Håvard Bjerkeli Jens Filbrich Axel Teichmann René Sommerfeldt Tobias Angerer Jens Arne Svartedal Odd-Bjørn Hjelmeset Lars Berger Tore Ruud Hofstad Frode Estil Tore Bjonviken Frode Andresen Ole Einar Bjørndalen Håvard Bjerkeli Tor Arne Hetland Thobias Fredriksson Peter Larsson Håvard Solbakken John Kristian Dahl Anders Aukland Frode Estil Kristen Skjeldal Tor Arne Hetland Jens Filbrich Andreas Schlütter René Sommerfeldt Tobias Angerer Martin Larsson Mats Larsson Johan Olsson Anders Högberg Andreas Schlütter Jens Filbrich Axel Teichmann Tobias Angerer Bruno Carrara Valerio Checchi Pietro Piller Cottrer Fulvio Valbusa Maxim Bulgakov Alexander Legkov Yevgeny Dementyev Sergey Novikov Alexandre Rousselet Christophe Perrillat Vincent Vittoz Emmanuel Jonnier Jens Filbrich Axel Teichmann René Sommerfeldt Tobias Angerer Nikolay Pankratov Mikhail Ivanov Yevgeny Dementyev Sergey Novikov Jens Filbrich Axel Teichmann Ivan Alypov Vasily Rochev René Sommerfeldt Tobias Angerer Franz Göring Andreas Schlütter Jens Filbrich Axel Teichmann Odd-Bjørn Hjelmeset Frode Estil Kristen Skjeldal Tore Ruud Hofstad Mats Larsson Jörgen Brink Anders Högberg Mathias Fredriksson Nikolay Pankratov Vasily Rochev Mats Larsson Björn Lind Odd-Bjørn Hjelmeset Jens Arne Svartedal Hilde Gjermundshaug Pedersen Marit Bjørgen Uschi Disl Claudia Künzel Alyona Sidko Evgenia Hahina Vibeke Skofterud Hilde Gjermundshaug Pedersen Kristin Størmer Steira Marit Bjørgen Manuela Henkel Stefanie Böhler Evi Sachenbacher Claudia Künzel Evgenia Hahina Alyona Sidko Ekaterina Vorontsova Olga Zavyalova Hilde Gjermundshaug Pedersen Marit Bjørgen Evi Sachenbacher Claudia Künzel Karin Moroder Cristina Kelder Vibeke Skofterud Marit Bjørgen Kristin Mürer Stemland Hilde Gjermundshaug Pedersen Stefanie Böhler Manuela Henkel Evi Sachenbacher Claudia Künzel Larisa Kurkina Lilia Vasilieva Ekaterina Vorontsova Olga Zavyalova Vibeke Skofterud Hilde Gjermundshaug Pedersen Kristin Størmer Steira Marit Bjørgen Manuela Henkel Viola Bauer Evi Sachenbacher Claudia Künzel Kirsi Välimaa Aino-Kaisa Saarinen Riikka Sarasoja Virpi Kuitunen Larisa Kurkina Lilia Vasilieva Ekaterina Vorontsova Olga Zavyalova Manuela Henkel Viola Bauer Anke Reschwam Schulze Claudia Künzel Marianna Longa Gabriella Paruzzi Antonella Confortola Sabina Valbusa Hilde Gjermundshaug Pedersen Marit Bjørgen Evi Sachenbacher Claudia Künzel Manuela Henkel Isabel Klaus Vibeke Skofterud Marit Bjørgen Kristin Størmer Steira Hilde Gjermundshaug Pedersen Larisa Kurkina Olga Zavyalova Ekaterina Vorontsova Yuliya Chepalova Aino-Kaisa Saarinen Satu Salonen Riikka Sarasoja Kati Venäläinen Ella Gjømle Hilde Gjermundshaug Pedersen Elina Hietamäki Pirjo Manninen Larisa Kurkina Olga Zavyalova