1972–73 Ekstraklasa
| Season | 1972–73 | 
|---|---|
| Dates | 26 July 1972 – 24 June 1973  | 
| Champions | Stal Mielec (1st title) | 
| Relegated | None (Polonia & Odra played playoff relegation)  | 
| European Cup | Stal Mielec | 
| Cup Winners' Cup | Legia Warsaw | 
| UEFA Cup | Ruch Chorzów Gwardia Warsaw  | 
| Matches played | 182 | 
| Goals scored | 373 (2.05 per match) | 
| Top goalscorer | Grzegorz Lato (13 goals)  | 
| Biggest home win | Stal 5–0 Gwardia Legia 5–0 ŁKS Zagłębie W. 5–0 Polonia  | 
| Biggest away win | Polonia 0–6 Stal | 
| Highest scoring | Gwardia 4–2 Odra Pogoń 5–1 Odra Polonia 0–6 Stal  | 
| Highest attendance | 60,000 | 
| Total attendance | 2,690,506 | 
| Average attendance | 14,783 14.0% | 
← 1971–72  1973–74 →   | |
The 1972–73 I liga was the 47th season of the Polish Football Championship and the 39th season of the I liga, the top Polish professional league for association football clubs, since its establishment in 1927. The league was operated by the Polish Football Association (PZPN).
The champions were Stal Mielec, who won their 1st Polish title.