In which state of India is Salsa most prevalent?
Salsa not being a contemporary Indian Dance is not prevalent in any state as such in India though there are many Salsa institutes and workshops that undertake classes to teach Salsa to the interested dancers. You will find at least one or multiple dance institutes that teach Salsa in all metropolitan cities be it Mumbai, Delhi, Kolkata, Chennai, Benguluru or Hyderabad and cosmopolitan cities too.
Latin Dance Salsa is undertaken by Indian men and women with great curiosity and thereby enrolled in with great excitement for both themselves and their children who fanatically want to take up this dance form.
So, even if you live in Kanpur city of Uttar Pradesh you will easily find a dance school and teacher who would teach you salsa though proficiently trained dancers are more in vicinity in Metropolitans.