The blazon of the municipal coat of arms is Argent, two Lions rampant combatant Gules holding together a Sword Or inverted.
Demographics
Conthey has a population of. Most of the population speaks French as their first language, German is the second most common and Portuguese is the third. There are 266 people who speak Italian and 4 people who speak Romansh. , the gender distribution of the population was 49.6% male and 50.4% female. The population was made up of 9,234 Swiss men and 2,426 non-Swiss men. There were 9,769 Swiss women and 2,066 non-Swiss women. Of the population in the district 9,952 or about 49.5% were born in Conthey and lived there in 2000. There were 4,710 or 23.4% who were born in the same canton, while 1,848 or 9.2% were born somewhere else in Switzerland, and 2,845 or 14.2% were born outside of Switzerland. , there were 7,876 people who were single and never married in the district. There were 10,191 married individuals, 1,227 widows or widowers and 800 individuals who are divorced. There were 2,070 households that consist of only one person and 565 households with five or more people. Out of a total of 7,937 households that answered this question, 26.1% were households made up of just one person and there were 113 adults who lived with their parents. Of the rest of the households, there are 2,100 married couples without children, 2,908 married couples with children There were 456 single parents with a child or children. There were 86 households that were made up of unrelated people and 204 households that were made up of some sort of institution or another collective housing. The historical population is given in the following chart: Colors= id:lightgrey value:gray id:darkgrey value:gray ImageSize = width:960 height:210 PlotArea = height:150 left:100 bottom:50 right:100 AlignBars = justify DateFormat = x.y Period = from:0 till:21000 TimeAxis = orientation:vertical AlignBars = justify ScaleMajor = gridcolor:darkgrey increment:4000 start:0 ScaleMinor = gridcolor:lightgrey increment:800 start:0 PlotData= color:yellowgreen width:40 mark: align:center bar:1850 from:start till:6043 text:"6,043" bar:1860 from:start till:6786 text:"6,786" bar:1870 from:start till:7356 text:"7,356" bar:1880 from:start till:7873 text:"7,873" bar:1888 from:start till:8363 text:"8,363" bar:1900 from:start till:8928 text:"8,928" bar:1910 from:start till:9357 text:"9,357" bar:1920 from:start till:9855 text:"9,855" bar:1930 from:start till:10295 text:"10,295" bar:1941 from:start till:11202 text:"11,202" bar:1950 from:start till:11740 text:"11,740" bar:1960 from:start till:12197 text:"12,197" bar:1970 from:start till:13714 text:"13,714" bar:1980 from:start till:15201 text:"15,201" bar:1990 from:start till:18485 text:"18,485" bar:2000 from:start till:20094 text:"20,094"
Politics
In the 2007 federal election the most popular party was the CVP which received 36.42% of the vote. The next three most popular parties were the FDP, the SP and the SVP. In the federal election, a total of 9,538 votes were cast, and the voter turnout was 63.0%. In the 2009 Conseil d'Etat/Staatsrat election a total of 8,362 votes were cast, of which 552 or about 6.6% were invalid. The voter participation was 55.5%, which is similar to the cantonal average of 54.67%. In the 2007 Swiss Council of States election a total of 9,418 votes were cast, of which 609 or about 6.5% were invalid. The voter participation was 62.5%, which is similar to the cantonal average of 59.88%.
Religion
From the, 16,802 or 83.6% were Roman Catholic, while 856 or 4.3% belonged to the Swiss Reformed Church. Of the rest of the population, there were 96 members of an Orthodox church, there were 16 individuals who belonged to the Christian Catholic Church, and there were 207 individuals who belonged to another Christian church. There were 6 individuals who were Jewish, and 506 who were Islamic. There were 27 individuals who were Buddhist, 16 individuals who were Hindu and 20 individuals who belonged to another church. 709 belonged to no church, are agnostic or atheist, and 934 individuals did not answer the question.
Education
In Conthey about 6,685 or of the population have completed non-mandatory upper secondary education, and 1,858 or have completed additional higher education. Of the 1,858 who completed tertiary schooling, 63.9% were Swiss men, 27.3% were Swiss women, 5.4% were non-Swiss men and 3.4% were non-Swiss women.