2003 UCI Road World Championships

{{Infobox cycling championship

|image= 2003 UCI Road World Championships logo.png

|pushpin_map = Canada Southern Ontario#Canada

|pushpin_label = Hamilton

|venue= Hamilton, Ontario, Canada

|coordinates = {{coord|43|15|24|N|79|52|09|W|region:CA-ON|display=inline,title}}

|date= 7–12 October 2003

|nations =

|cycling =

|events = 10

|previous = 2002

|next = 2004

}}

Image:WorldCyclingChampionships2003.jpg

The 2003 UCI Road World Championships took place in Hamilton, Ontario, Canada, between October 7 and October 12, 2003. The event consisted of a road race and a time trial for men, women, men under 23, junior men and junior women.

David Millar was handed a two-year ban and stripped of his world time trial title by the British cycling federation for taking the banned performance enhancer EPO.{{cite web

| title = Millar has '03 title taken, fined $1,600

| publisher = ESPN

| date = 4 August 2004

| url = https://www.espn.com/olympics/summer04/cycling/news/story?id=1852059

| access-date = 24 December 2007 }} Following this disqualification, the UCI declared Michael Rogers as the winner with the silver medal going to Uwe Peschel and the bronze to Michael Rich.{{cite web

| title = Rogers confirmed as world champion

| publisher = mywire.com

| date = 8 September 2004

| url = http://www.mywire.com/pubs/AFP/2004/09/08/574079?&pbl=222

| access-date = 24 December 2007 }}

Jeannie Longo rode alone ahead of the pack for most of the women's road race but was passed approximately 500m from the finish.