Thirty MNS activists were arrested by Thane Police, while the remaining six were arrested by Mumbai Police.
MNS had on October 5 given 15-days ultimatum to the railway administration and the police to clear the foot overbridges of illegal hawkers after the Elphinstone Road railway station stampede claimed 23 lives on September 29.
The party had warned that if the authorities fail to evict hawkers it would take the responsibility upon itself to remove them from the foot overbridges.
On Saturday, the Thane MNS unit had forcibly evicted the hawkers from Thane railway station. Today the police arrested MNS workers including its president Avinash Jadhav.
Meanwhile, 12 MNS workers were arrested in Kalyan and 11 were held from Dombivili, Thane police PRO Sukhada Narkar said.
In Mumbai, MNS workers today organised protests and attempted to drive out illegal hawkers outside the railway stations, police said.
In another incident in western suburbs MNS leader Akhil Chitre and five other party workers were arrested for forcefully trying to evict hawkers near Santa Cruz railway station, a senior police official said today.
The MNS workers forcefully evicted number of hawkers near Santa Cruz station last night, he said.
Following the the incident, the aggrieved hawkers approached Vakola police station and lodged a complaint against the MNS workers, the official said.
Acting on the complaint, police detained Mr Chitre and five others late last night and placed them under arrest today, the official said.
They have been booked for rioting and were produced in the court, the official said, adding further investigation into the matter is underway.