Boston Celtics history

Titles, retired numbers, the franchise timeline, a season-by-season arc, and head-to-head records.

Banners in the rafters

18 championships in 81 seasons since 1946-47. The last one was 3 seasons ago.

Champs57Champs59

1950s

Champs60Champs61Champs62Champs63Champs64Champs65Champs66Champs68Champs69

1960s

Champs74Champs76

1970s

Champs81Champs84Champs86

1980s

Champs08

2000s

Champs24

2020s

Franchise scrapbook

All-time ledger and fan lore through 2025-26.

What counts

Records, titles and leaders include every league this franchise played in (NBA, ABA or BAA). Retired numbers include banners for coaches and owners. Streaks and lore are curated.

Championships

1957 · 1959 · 1960 · 1961 · 1962 · 1963 · 1964 · 1965 · 1966 · 1968 · 1969 · 1974 · 1976 · 1981 · 1984 · 1986 · 2008 · 2024

Finals appearances

11 conference titles

Playoff seasons

Seasons that reached the postseason

Regular season

3,751-2,527

59.7% all-time

Peaks & valleys

Franchise timeline

Only the current name is mapped for this franchise. Earlier names, if any, are listed in the scrapbook above.

Boston Celtics
Boston · BOS · 1946-47 → present
Open 1946-47

Franchise scrapbook ↑ · All franchises

Team Arc

How this team got here, from season board history (not asset genealogy).

Show full history →Rank this team's seasons

Team-season board rows available 2021-22 → 2025-26 for this team. Cross-season metrics limited to stable counting/efficiency fields (point differential, TS%, eFG%, PPG, opp PPG). Arc coverage starts 2001-02 (documented team-board reliability floor). Earlier seasons are not treated as zeros. Absent from board in 2026-27.

Continuity follows this team's id across seasons. It is not a merged multi-franchise genealogy.

Biggest team changes

Same noise floors and trend method as analyzeTeamProfile.

2024-25 → 2025-26
- Point differential-1.5
- Blocks / game-0.5
- Assist / turnover-0.16
- 3-point volume-6.9 pts
2023-24 → 2024-25
- Point differential-2.2
- Opponent PPG-2.1
- Blocks / game-1.0
- 3-point volume+6.5 pts
2022-23 → 2023-24
- Point differential+4.8
- Opponent PPG-2.1
- Turnovers / game-1.5
- Blocks / game+1.3
2021-22 → 2022-23
- Opponent PPG+6.8
- Steals / game-0.9
- Blocks / game-0.6
- Assist / turnover+0.19

Season	Diff	TS%	eFG%	Off	Def	Explore
2025-26	+7.6	58.3%	55.3%	114.9	107.3	Season·Compare·Evidence·Games·Ask
2024-25	+9.1	59.1%	56.1%	116.3	107.2	Season·Compare·Evidence·Games

Off = team PPG · Def = opponent PPG. Missing cells are unavailable, not zero. Pick a season to see that year's roster on the Players tab.

Loading Team Arc…

Boston Celtics history

Banners in the rafters

Franchise scrapbook

Peaks & valleys

Franchise timeline

Team Arc

Biggest team changes

Franchise leaders

Fan lore

Team Arc

Biggest team changes