WASHINGTON — As Republicans took control of an unprecedented 69 of 99 statehouse chambers in the midterm elections, they did not rely solely on a bench of older white men. Key races hinged on the strategic recruitment of women and minorities, many of them first-time candidates who are now learning the ropes and joining the pool of prospects for higher office.

They include Jill Upson, the first black Republican woman elected to the West Virginia House; Victoria Seaman, the first Latina Republican elected to the Nevada Assembly; Beth Martinez Humenik, whose win gave Republicans a one-seat edge in the Colorado Senate; and Young Kim, a Korean-American woman who was elected to the California Assembly, helping to break the Democratic supermajority in the State Legislature.

In Pennsylvania, Harry Lewis Jr., a retired black educator, won in a new House district that was expected to be a Democratic stronghold; he printed his campaign materials in English and Spanish. Of the 12 Latinos who will serve in statewide offices across the nation in 2015, eight are Republican.

“This is not just rhetoric — we spent over $6 million to identify new women and new candidates of diversity and bring them in,” said Matt Walter, the executive director of the Republican State Leadership Committee. “Most of these chambers were flipped because there was a woman or a person of diverse ethnicity in a key targeted seat.”