Introduction:
Knowing smokers’ opinions about smoking regulations is vital to assess their acceptance and ensure compliance. We explored smokers’ opinions and support for smoking bans in enclosed and public open settings, some not covered by the current Spanish legislation.

Material and Methods:
The 2021 International Tobacco Control EUREST-PLUS Spain Survey used a nationally representative sample of 1006 smokers aged ≥18 years. A detailed questionnaire was administered in person or by telephone. We explored smokers’ opinions and support by socio-demographics and smoking characteristics. We fitted Poisson regression models with robust variance adjusted for age and sex to identify associated factors.

Results:
Most smokers think that smoking should not be allowed in schoolyards of primary (98.0%) and secondary schools (97.4%) and in cars with preschool children (98.2%), children aged <16 (96.2%) or non-smokers (83.2%); the percentage was lower for beaches (15.7%) and outdoor terraces of bars/pubs (15.2%) and restaurants (18.4%). Factors strongly associated with thinking that smoking should not be allowed on outdoor terraces were not having partner/friends who smoke compared to having a smoking partner and not considering themselves addicted to cigarettes. This last factor was also associated with thinking that smoking should not be allowed at beaches, entrances to public buildings, and open stadiums. Support for further complete smoke-free bans in open areas was moderate (<60%). High nicotine-dependence (assessed with the Heavy Smoking Index) was significantly associated with supporting a complete ban at entrances of public buildings and in markets/malls, whereas not having partner/friends who smoked were significantly associated with not supporting a complete ban at swimming pools.

Conclusions:
Smokers were mostly in favour of smoking regulations in places with minors, but they had heterogeneous opinions about the regulations in other settings.