Saint-Christophe-sur-le-Nais (French pronunciation: [sɛ̃ kʁistɔf syʁ lə nɛ]) is a commune in the Indre-et-Loire department in central France. It is situated on the border of the department of Sarthe, 30 km (19 mi) northwest of Tours.

The railway linking Caen, Le Mans and Tours ensures a regular traffic for goods and passengers at the Saint-Paterne-Racan station located 2 km (1.2 mi) SE. There are daily buses to Tours. The river Escotais is full of fish and attracts many fishermen. The commune is 18.27 km (7.05 sq mi), 1.33 km (0.51 sq mi) are meadows, 16 km (6.2 sq mi) are farmlands including 14.09 km (5.44 sq mi) arable lands and 0.7 km (0.27 sq mi) of orchards are found.

The village was founded around the year 1000. It received fortifications in the 13th century. On the other side of the railway, the agglomerated part, Le Faubourg de Vienne had workmen of flourishing industries of the commune. Saint-Christophe-sur-le-Nais includes the presence of many underground cavities, many slopes that used to be covered with vines add the undeniable charm to the village.

Historical population

Year	Pop.	±% p.a.
1968	1,022	—
1975	932	−1.31%
1982	877	−0.87%
1990	925	+0.67%
1999	965	+0.47%
2007	1,124	+1.92%
2012	1,080	−0.80%
2017	1,127	+0.86%
Source: INSEE

In 2017, 21% of the population were under the age of 15.

The commune's unemployment rate is 9.5% as of 2020.

• Communes of the Indre-et-Loire department

• Official Web site
• Old postcards of the commune