Martigny has a population of. Most of the population speaks French as their first language, Portuguese is the second most common and Italian is the third. There are 516 people who speak German and 17 people who speak Romansh. , the gender distribution of the population was 49.4% male and 50.6% female. The population was made up of 14,638 Swiss men and 5,224 non-Swiss men. There were 15,790 Swiss women and 4,518 non-Swiss women. Of the population in the district 15,012 or about 44.6% were born in Martigny and lived there in 2000. There were 8,129 or 24.1% who were born in the same canton, while 3,114 or 9.2% were born somewhere else in Switzerland, and 6,505 or 19.3% were born outside of Switzerland. , there were 13,777 people who were single and never married in the district. There were 16,152 married individuals, 2,192 widows or widowers and 1,572 individuals who are divorced. There were 4,529 households that consist of only one person and 1,073 households with five or more people. Out of a total of 13,999 households that answered this question, 32.4% were households made up of just one person and there were 167 adults who lived with their parents. Of the rest of the households, there are 3,294 married couples without children, 4,609 married couples with children There were 860 single parents with a child or children. There were 171 households that were made up of unrelated people and 369 households that were made up of some sort of institution or another collective housing.
On 1 August 1964 the former municipalities of Martigny-Bourg and Martigny-Ville merged to form the new municipality of Martigny.
Politics
In the 2007 federal election the most popular party was the CVP which received 30.87% of the vote. The next three most popular parties were the FDP, the SVP and the SP. In the federal election, a total of 14,438 votes were cast, and the voter turnout was 60.8%. In the 2009 Conseil d'Etat/Staatsrat election a total of 12,925 votes were cast, of which 887 or about 6.9% were invalid. The voter participation was 54.2%, which is similar to the cantonal average of 54.67%. In the 2007 Swiss Council of States election a total of 14,242 votes were cast, of which 1,055 or about 7.4% were invalid. The voter participation was 61.0%, which is similar to the cantonal average of 59.88%.
Religion
From the, 27,493 or 81.6% were Roman Catholic, while 1,624 or 4.8% belonged to the Swiss Reformed Church. Of the rest of the population, there were 185 members of an Orthodox church, there were 22 individuals who belonged to the Christian Catholic Church, and there were 508 individuals who belonged to another Christian church. There were 4 individuals who were Jewish, and 1,155 who were Islamic. There were 41 individuals who were Buddhist, 21 individuals who were Hindu and 39 individuals who belonged to another church. 1,478 belonged to no church, are agnostic or atheist, and 1,365 individuals did not answer the question.
Education
In Martigny about 10,545 or of the population have completed non-mandatory upper secondary education, and 3,057 or have completed additional higher education. Of the 3,057 who completed tertiary schooling, 55.4% were Swiss men, 29.2% were Swiss women, 9.4% were non-Swiss men and 5.9% were non-Swiss women.
