Jones and Spencer had each said they ran to fundamentally change the way city government works.
Jones went into the general election as the favorite after finishing first in the four-way March 2 primary election. Spencer, a councilor since 201
Jones emphasized her eight years of management experience as treasurer, citing her efforts to modernize parking operations and five years before that as a state representative.
She also cited her existing relationships at the local, state and federal levels, particularly with St. Louis County Executive Sam Page, who supported her.
Spencer, 42, portrayed herself as an independent of old-fashioned town hall politics and as an enemy with special interests, citing her leadership on the board to fight, among other things, the leasing of St. Louis Lambert International Airport.
Jones, who will be the city’s 47th mayor, will face some serious challenges, including violent crime underlined by a high murder rate.
She has said she wants to shift police from an arrest and jail model to a prevention model and expand the use of mental health and other professionals to handle some 911 calls.
Jones will also have to deal with the conditions in the largest city prison in the city center – which was shaken on Sunday by riots for the second time in two months.