Saint-Jules (French pronunciation: [sɛ̃ ʒyl]) is a parish municipality in the Beauce-Centre Regional County Municipality in the Chaudière-Appalaches region of Quebec, Canada. Its population was 547 as of the Canada 2021 Census. It is named after Pope Julius I.

In the 2021 Census of Population conducted by Statistics Canada, Saint-Jules had a population of 547 living in 204 of its 215 total private dwellings, a change of 1.5% from its 2016 population of 539. With a land area of 55.73 km (21.52 sq mi), it had a population density of 9.8/km (25.4/sq mi) in 2021.

Population trend:

Census	Population	Change (%)
2021	547	1.5%
2016	539	5.9%
2011	573	7.3%
2006	534	0.2%
2001	535	0.4%
1996	537	3.8%
1991	558	2.4%
1986	572	6.7%
1981	613	5.8%
1976	651	15.2%
1971	768	5.4%
1966	812	0.1%
1961	811	6.8%
1956	870	9.2%
1951	797	1.5%
1941	785	26.8%
1931	619	4.7%
1921	591	N/A%

• Janvier Grondin, Coalition Avenir Québec politician
• Placide Poulin, businessman

• Commission de toponymie du Québec
• Ministère des Affaires municipales, des Régions et de l'Occupation du territoire