Tréhet (French pronunciation: [tʁe.ɛ]) is a former commune of the Loir-et-Cher department in central France. On 1 January 2019, it was merged into the new commune Vallée-de-Ronsard.

The commune is situated on the left bank of the Loir close to the Sarthe department communes of La Chartre-sur-le-Loir and Ruillé-sur-Loir and is traversed by the Niclos stream.

The name derives from Latin trajectus (crossing).

Historical population

Year Pop. ±% 1793 195 —     1806 146 −25.1% 1821 166 +13.7% 1831 215 +29.5% 1841 203 −5.6% 1851 218 +7.4% 1861 204 −6.4% 1872 190 −6.9% 1881 191 +0.5% 1891 179 −6.3% 1901 187 +4.5% 1911 180 −3.7%

Year Pop. ±% 1921 154 −14.4% 1931 145 −5.8% 1946 188 +29.7% 1954 170 −9.6% 1962 176 +3.5% 1968 163 −7.4% 1975 168 +3.1% 1982 141 −16.1% 1990 100 −29.1% 1999 123 +23.0% 2005 109 −11.4% 2019 107 −1.8%

Its small partly Romanesque church is dedicated to Mary has recently been restored, revealing early wall paintings (the subject is the martyrdom of St. Lawrence).

• Communes of the Loir-et-Cher department