Ngong and Kajiado towns will be upgraded to municipal status having surpassed the population benchmark of over 200,000 people as required by law.
Governor Joseph Lenku made the announcement in Ngong on Thursday after unveiling several water projects in the area.
The Constitution gives a governor, on the resolution of the county assembly, powers to confer the status of a municipality on a town.
This is as long as the said urban settings meets the criteria set out in sub-section (3) of the Urban Area and Cities Act No. 12 of 2011.
The procedure set out under Section 8 (1) to (4) of the Act No. 13 shall apply with necessary modifications to the conferment of municipal status to a town.
Sub-section 3 of the Act says a town is eligible for conferment of municipal status if it has a population of at least 250,000 residents.
This should be in accordance with the final gazetted results of the last population census carried out by an institution authorised under any written law.
Lenku told the Star the two towns qualify because they have integrated development plans in accordance with the law.
He added that the urban areas have a demonstrable revenue collection potential.