The race started at Stormont at 9am with participants beginning their 26.2-mile challenge through the north, south, east and west of the city, with the finish in Ormeau Park.
Thousands more lined the streets to cheer on those taking part and soak up the atmosphere.
It was great day for athletes across the island of Ireland and beyond, with Abay Alemu in first place in a time of 2:16:23 with second place winner Teadese Mamo right beside in a time of 2:16:24. In third place was Abera Ketema in a time of 2:17:38.
For the ladies, Aziza Alaoui Selsouli came in first in a time of 2:38:00. In second place, Judith Storm of City of Derry Spartans finished in a time of 2:39:09 with Melissah Gibson of Ealing Eagles in third in a time of 2:42:44.
Congratulations also to Jayne Bleakley who won the Wheelchair Race in a time of 2:32:39
13. Belfast City Marathon
Chloe McKelveey, Kelly Graham, Grace Boyd and Joanna Singleton pause for a photo at the Phoenix Energy Belfast City Marathon leaving the grounds of the Stormont Estate. Photo: Kelvin Boyes / Press Eye
14. Belfast City Marathon
Joanna Curran and Ellie Moore at the Phoenix Energy Belfast City Marathon on Sunday. Photo: Kelvin Boyes / Press Eye
15. Belfast City Marathon
Supporters along the route of the Phoenix Energy Belfast City Marathon. Photo: Kelvin Boyes / Press Eye
16. Belfast City Marathon
Supporters lining the marathon route. Photo: Kelvin Boyes / Press Eye