Over 15.76 lakh diyas had been lit by more than 20,000 volunteers to mark the occasion.
The three-day Diwali celebrations had begun in the state from 21 October and came to an end on 23 October.
The ghats of the Saryu river had also been adorned with colourful lights and earthen lamps amid the festivities
Apart from the lighting of diyas, over a dozen tableaux showcased dance forms from different states during the occasion.
Ahead of the occasion, PM Modi had offered prayers at the Ram Janmbhoomi, marking his first visit to the temple since he he took part in its "bhoomi pujan" in August 2020.