The five veterans on Richmond City Council will have four new colleagues in dealing with the plans and initiatives of the new mayor.

Richmond voters filled four City Council vacancies in Tuesday’s election, while also awarding new four-year terms to the five incumbents, all of whom overcame challengers.

Among the races that drew the most attention was one involving the longest serving member of the council, Ellen F. Robertson, 65.

Ms. Robertson, who has represented the 6th District for 13 years, faced a stiff challenge from political and nonprofit consultant Donald L. Moss III. She won 56 percent of the vote to retain her seat.

Meanwhile, two popular members of the Richmond School Board scored victories in their bids to serve on City Council and influence decisions on city funding of public education.

Kimberly B. “Kim” Gray won a three-way race in the 2nd District to succeed outgoing two-term Councilman Charles R. Samuels.

A real estate agent, Ms. Gray, 45, won overwhelming majorities in the Carver School and the Dominion Place precincts to secure her victory with 49 percent of the vote and defeat rivals Charles Diradour and Rebecca K.W. Keel.

Separately, freelance writer Kristen N. Larson, 42, won a five-way race to replace retiring 12-year veteran Kathy C. Graziano in the 4th District. Ms. Larson won 37 percent of the vote to outpace runner-up Timothy E. Grimes, a legislative aide to Ms. Graziano, who had strongly backed him.

Ms. Larson also defeated Johnny S. Walker, Jeff B. Thomas Jr. and Larry A. Olanrewaju, a former School Board representative from the district.

The other City Council winners are:

1st District: Andreas D. Addison, 34, won the three-way race to replace first-term Councilman Jonathan T. Baliles, who ran unsuccessfully for mayor. The founder, president and CEO of Civic Innovator LLC, Mr. Addison captured 45 percent of the vote to outpace runner-up Harry H. Warner Jr. and Jonathan M. Cruise.

3rd District: Incumbent Councilman Chris A. Hilbert, 56, a state housing authority loan officer who was first elected to the council in 2004, secured 60 percent of the vote to beat three challengers, Milondra B. Coleman, Dorian O. Daniels and Hassan J. Fountain.

5th District: First-term Councilman Parker C. Agelasto, 40, executive director of the Capital Region Land Conservancy, captured 65 percent of the vote to easily defeat two challengers, Montigue T. Magruder and Garrett L. Sawyer.

7th District: Councilwoman Cynthia I. Newbille, who works for the Richmond Memorial Health Foundation, gained 77 percent of the vote to defeat her challenger, Josh M. Williams. Ms. Newbille has served on the council since 2009.

8th District: Councilwoman Reva M. Trammell, 62, who manages residential property, received 78 percent of the vote to easily defeat her challenger, Amelia E. Lightner. Ms. Trammell has served 13 years on City Council, first from 1998 to 2002. She regained her seat in 2007 and has served since then.

9th District: The Rev. Michael J. Jones, 49, founder and pastor of Village of Faith Ministries in Henrico and Chesterfield counties, emerged as the clear winner from the four-way race to succeed first-term Councilwoman Michelle R. Mosby, who lost her bid to be mayor. Rev. Jones captured 56 percent of the vote to defeat Bishop Leon Benjamin Sr., Germika T. Pegram and Marcus Omar Squires.