BACKGROUND: Public toilets are an important resource for securing gender equitable access to public space, but they are neglected across global contexts. This qualitative study explored the status, opportunities and challenges to creating menstrual friendly public toilets (MFPTs) in six cities: Barcelona, Kampala, Manila, New York City, Osaka, and Rio de Janeiro. METHODS: We conducted key informant interviews (KIIs) representing public, private, and non-governmental organizations familiar with public toilets or menstrual health and equity advocacy in their respective cities. Interviews covered various topics related to the quality and priority of public toilets, status of menstruation-related provisions, and opportunities and challenges for creating menstrual friendly public toilets. We conducted thematic analysis of interview transcripts to identify overarching emerging themes and their city-specific implications. RESULTS: Three themes emerged: 1) "Menstrual friendly public toilet" is a compelling concept 2) Bureaucratic complexity and low priority for public toilets present barriers to MFPTs
and 3) Connecting menstrual stigma and public toilet inadequacy are advocacy opportunities. DISCUSSION: Despite variations in resourcing, infrastructure, and priorities for public sanitation across cities, the idea of an MFPT prompted a common reflection on the inequities inherent in deficiencies in public toilet infrastructure
challenges posed by the combination of complicated public toilet decision-making and under-resourcing
and menstrual stigma. Mobilizing action around the shared need to improve public toilets and defining concrete context-specific features of an MFPT are common strategic priorities. CONCLUSION: Findings highlight the value of the concept of an MFPT and its potential to contribute to improving gender equitable access to urban public spaces through investments in sanitation.