La Bastide-Solages is located some 25 km east by north-east of Albi and 28 km east by south-east of Carmaux just inside the Parc Naturel Regional des Grands Causses. The north-western and southern borders of the commune are the departmental border with Tarn. Access to the commune is by the D555 which branches from the D33 east of the commune and comes west through the village then north to rejoin the D33 north of the commune. The D665 branches from the D555 in the south of the commune and follows the southern border west to a bridge across the Tarn which links to the D172. Apart from the village there are the hamlets of La Carriere Basse, Cayssials, La Carriere Haute, La Bastide, and Le Bousquet. The commune is farmland in the middle with forests in the east and west.
The Tarn river forms the whole north-western border as it flows south-west to eventually join the Garonne at Boudou. The Rance river forms the southern border of the commune as it flows west to join the Tarn at the western tip of the commune.
In 2010 the commune had 116 inhabitants. The evolution of the number of inhabitants is known from the population censuses conducted in the commune since 1793. From the 21st century, a census of communes with fewer than 10,000 inhabitants is held every five years, unlike larger communes that have a sample survey every year.[Note 1]
Christian-Pierre Bedel, Sent-Sarnin, Balaguièr, Brasc, Combret, Copiac, La Bastida-Solatges, La Sèrra, La Val-Ròca-Cesièira, Martrinh, Montclar, Montfranc, Plasença, Postòmis, Sant-Jòri / Christian-Pierre Bedel et les habitants del canton de Sent-Sarnin, Rodez, Mission départementale de la culture, 1992, Al canton collection, 232 pages, ill., cov. ill. 28 cm, ISBN 2-907279-10-6, ISSN 1151-8375, BnF 35529736f (French)
^At the beginning of the 21st century, the methods of identification have been modified by Law No. 2002-276 of 27 February 2002, the so-called "law of local democracy" and in particular Title V "census operations" allows, after a transitional period running from 2004 to 2008, the annual publication of the legal population of the different French administrative districts. For communes with a population greater than 10,000 inhabitants, a sample survey is conducted annually and the entire territory of these communes is taken into account at the end of the period of five years. The first "legal population" after 1999 under this new law came into force on 1 January 2009 and was based on the census of 2006.