Frans (French pronunciation: [fʁɑ̃]), known colloquially as Frans-les-Vernes, is a commune in the Ain department in eastern France.

The village is located in the south-western part of the Ain department in the fertile Val de Saône some 35 km north of Lyon and 4 km east of Villefranche-sur-Saône.

The inhabitants of Frans are called Franvernois

Historical population

Year Pop. ±% p.a. 1793 214 —     1800 208 −0.41% 1806 281 +5.14% 1821 338 +1.24% 1831 312 −0.80% 1836 325 +0.82% 1841 339 +0.85% 1846 371 +1.82% 1851 379 +0.43% 1856 355 −1.30% 1861 380 +1.37% 1866 401 +1.08% 1872 400 −0.04% 1876 383 −1.08% 1881 373 −0.53% 1886 349 −1.32% 1891 351 +0.11% 1896 368 +0.95%	Year Pop. ±% p.a. 1901 372 +0.22% 1906 388 +0.85% 1911 360 −1.49% 1921 347 −0.37% 1926 384 +2.05% 1931 391 +0.36% 1936 404 +0.66% 1946 416 +0.29% 1954 455 +1.13% 1962 478 +0.62% 1968 528 +1.67% 1975 752 +5.18% 1982 1,000 +4.16% 1990 1,549 +5.62% 1999 1,848 +1.98% 2007 1,972 +0.82% 2012 1,972 +0.00% 2017 2,351 +3.58%
Source: EHESS and INSEE (1968-2017)

• Communes of the Ain department