|1973 Baltimore Colts season|
|Head coach||Howard Schnellenberger|
|Home field||Memorial Stadium|
|Division place||T-4th AFC East|
|Playoff finish||did not qualify|
The 1973 Baltimore Colts season was the 21st season for the team in the National Football League. The Baltimore Colts finished the National Football League's 1973 season with a record of 4 wins and 10 losses, and finished tied for fourth in the AFC East with the New York Jets. The Colts lost the tiebreaker to the New York based on head-to-head series (0–2).
The Colts were the only team to lose to the Houston Oilers, bowing 31-27 in week eight at home. The Oilers broke an 18-game losing streak with the victory.
Before the 1973 season, the Colts traded their long-time quarterback, Johnny Unitas, to the San Diego Chargers. Unitas had been splitting quarterback duties with Earl Morrall and Marty Domres over the past few seasons. Unitas played one season for San Diego before retiring.
|1||September 16, 1973||at Cleveland Browns||L 14–24||0–1||Cleveland Municipal Stadium||
|2||September 23, 1973||New York Jets||L 10–34||0–2||Memorial Stadium||
|3||September 30, 1973||New Orleans Saints||W 14–10||1–2||Memorial Stadium||
|4||October 7, 1973||at New England Patriots||L 16–24||1–3||Schaefer Stadium||
|5||October 14, 1973||at Buffalo Bills||L 13–31||1–4||Rich Stadium||
|6||October 21, 1973||at Detroit Lions||W 29–27||2–4||Tiger Stadium||
|7||October 28, 1973||Oakland Raiders||L 21–34||2–5||Memorial Stadium||
|8||November 4, 1973||Houston Oilers||L 27–31||2–6||Memorial Stadium||
|9||November 11, 1973||at Miami Dolphins||L 0–44||2–7||Miami Orange Bowl||
|10||November 18, 1973||at Washington Redskins||L 14–22||2–8||RFK Stadium||
|11||November 25, 1973||Buffalo Bills||L 17–24||2–9||Memorial Stadium||
|12||December 2, 1973||at New York Jets||L 17–20||2–10||Shea Stadium||
|13||December 9, 1973||Miami Dolphins||W 16–3||3–10||Memorial Stadium||
|14||December 16, 1973||New England Patriots||W 18–13||4–10||Memorial Stadium||
|New England Patriots||5||9||0||.357||1–7||3–8||258||300||L2|
|New York Jets||4||10||0||.286||4–4||4–7||240||306||L2|