Elections to the Baseball Hall of Fame for 2006 proceeded in keeping with rules enacted in 2001, augmented by a special election; the result was the largest class of inductees (18) in the Hall's history, including the first woman elected. The Baseball Writers' Association of America (BBWAA) held an election to select from among recent players. The Veterans Committee did not hold an election; the 2001 rules changes provided that elections for players retired over 20 years would be held every other year, with elections of non-players (managers, umpires and executives) held every fourth year. The Committee voted in 2005 on players who were active no later than 1983; there was no 2005 election for non-players. Elections in both categories were held in 2007.
On July 26, 2005, the Hall announced that its Board of Directors had approved a special election to be held in 2006, by the Committee on African-American Baseball, of Negro leagues and pre-Negro leagues candidates.
Induction ceremonies in Cooperstown were held July 30 with Commissioner Bud Selig presiding.
The BBWAA was again authorized to elect players active in 1986 or later, but not after 2000; the ballot, announced on November 28, 2005, included candidates from the 2005 ballot who received at least 5% of the vote but were not elected, along with selected players, chosen by a screening committee, whose last appearance was in 2000. All 10-year members of the BBWAA were eligible to vote.
Voters were instructed to cast votes for up to 10 candidates; any candidate receiving votes on at least 75% of the ballots would be honored with induction to the Hall. Results of the 2006 election by the BBWAA were announced on January 10. The ballot consisted of 29 players; 520 ballots were cast, with 390 votes required for election. A total of 2933 individual votes were cast, an average of 5.64 per ballot. Those candidates receiving less than 5% of the vote will not appear on future BBWAA ballots, but may eventually be considered by the Veterans Committee.