Hong Kong leader Carrie Lam said that the government would "seriously reflect" on the pro-democracy candidate's victory after the local democratic election.
According to local media reports, 17 of the 18 district councils are now controlled by pro-democracy councillors.
The election, the first since the wave of anti-Beijing protests began, saw an unprecedented turnout of more than 71%.
This was seen as a severe condemnation of Ms. Lam's leadership and expressed support for the protest movement.
Carrie Lam said in a statement on Monday that the government respected the result.
She said that many believe the findings reflect "people's dissatisfaction with current conditions and deep-seated issues in society.”
She said the government would "hear the public opinion and reflect seriously."