E-cigarette use indoors in public spaces is generally prohibited under laws and regulations governing smoking. Policies increasingly treat vaping similarly to traditional tobacco smoking.
General Rule: Indoors in Public Spaces
Most countries, states, and municipalities ban using electronic cigarettes indoors in public places and workplaces. Key examples include:

- Restaurants, Bars, and Pubs: Prohibited nearly universally.
- Government Buildings: Including offices, courthouses, and libraries.
- Public Transport: On buses, trains, subways, planes (federally banned), and in stations.
- Healthcare Facilities: Hospitals, clinics, doctor’s offices.
- Educational Institutions: Schools (K-12), universities/colleges, both indoors and often on grounds.
- Retail Stores and Malls.
- Workplaces.
Why Indoor Vaping is Restricted
- Health Concerns: Vape aerosol contains nicotine, ultrafine particles, volatile organic compounds, and potential toxins, posing risks to bystanders via secondhand exposure.
- Policy Standardization: Laws like the US FDA deeming rule and similar frameworks elsewhere classify e-cigarettes as tobacco products for regulatory purposes.
- Clean Indoor Air Laws: Smoke-free legislation frequently includes e-cigarettes explicitly or is interpreted to cover them.
Exceptions (Varies by Location)
- Vape Shops: Some jurisdictions allow sampling/testing inside dedicated retail stores.
- Designated Smoking Rooms: Very rare, as most smoke-free laws prohibit indoor smoking rooms entirely.
- Casinos: Regulations vary significantly; some permit vaping in specific gaming areas.
- Private Residences and Vehicles: Generally outside public space regulations, but subject to occupant rules.
Private Businesses & Venues
Business owners (e.g., bars, hotels) typically cannot independently allow indoor vaping if state/local law prohibits it. Property owners set rules for private, non-public indoor areas.
Always verify the specific laws in your city, state, or country and comply with venue signage, as regulations are location-specific and constantly evolving.