Saint-Denis-d'Aclon (French pronunciation: [sɛ̃ dəni daklɔ̃]) is a commune in the Seine-Maritime department in the Normandy region in north-western France.

A small farming village situated by the banks of the river Saâne in the Pays de Caux, at the junction of the D27 and the D127 roads, some 7 miles (11 km) southwest of Dieppe.

Historical population

Year Pop. ±% p.a. 1793 100 —     1800 162 +7.13% 1806 175 +1.29% 1821 101 −3.60% 1831 143 +3.54% 1836 159 +2.14% 1841 158 −0.13% 1846 157 −0.13% 1851 154 −0.39% 1856 153 −0.13% 1861 174 +2.61% 1866 156 −2.16% 1872 143 −1.44% 1876 155 +2.03% 1881 152 −0.39% 1886 164 +1.53% 1891 160 −0.49% 1896 168 +0.98%	Year Pop. ±% p.a. 1901 189 +2.38% 1906 193 +0.42% 1911 207 +1.41% 1921 166 −2.18% 1926 183 +1.97% 1931 154 −3.39% 1936 158 +0.51% 1946 159 +0.06% 1954 178 +1.42% 1962 184 +0.42% 1968 209 +2.15% 1975 271 +3.78% 1982 274 +0.16% 1990 235 −1.90% 1999 196 −2.00% 2007 177 −1.27% 2012 144 −4.04% 2017 132 −1.73%
Source: EHESS and INSEE (1968-2017)

• The Saint-Denis church, dating from the nineteenth century.

• Communes of the Seine-Maritime department