Cessieu (French pronunciation: [sɛsjø]) is a commune in the Isère department in south-eastern France.

The Bourbre flows west through the middle of the commune and crosses the village.

Historical population

Year Pop. ±% p.a. 1793 1,606 —     1800 1,676 +0.61% 1806 1,698 +0.22% 1821 1,828 +0.49% 1831 2,012 +0.96% 1836 2,022 +0.10% 1841 2,033 +0.11% 1846 1,982 −0.51% 1851 1,858 −1.28% 1856 1,777 −0.89% 1861 1,728 −0.56% 1866 1,712 −0.19% 1872 1,687 −0.24% 1876 1,674 −0.19% 1881 1,566 −1.32% 1886 1,532 −0.44% 1891 1,438 −1.26% 1896 1,364 −1.05%	Year Pop. ±% p.a. 1901 1,300 −0.96% 1906 1,227 −1.15% 1911 1,206 −0.34% 1921 1,020 −1.66% 1926 1,154 +2.50% 1931 1,127 −0.47% 1936 1,116 −0.20% 1946 1,167 +0.45% 1954 1,161 −0.06% 1962 1,343 +1.84% 1968 1,609 +3.06% 1975 1,610 +0.01% 1982 1,682 +0.63% 1990 2,025 +2.35% 1999 2,112 +0.47% 2007 2,558 +2.42% 2012 2,679 +0.93% 2017 2,984 +2.18%
Source: EHESS and INSEE (1968-2017)

Cessieu is twinned with:

• Civitella Roveto, Italy, since 2004

• Communes of the Isère department