The 1966 Houston Oilers season was the seventh season for the Houston Oilers as a professional AFL franchise; The team failed to improve on their previous output of 4–10, winning only three games.^[1] The Oilers failed to qualify for the playoffs for the fourth consecutive season, and were swept by the expansion Miami Dolphins.

Two bye weeks were necessary in 1966, as the league expanded to an odd-number (9) of teams;
one team was idle each week (three teams were idle in week one). The Oilers played each team twice, except for two from other division (Kansas City, San Diego)

Note: Tie games were not officially counted in the standings in the AFL.^[2][3]