Most wins by an NBA head coach

Gregg Popovich has the most regular-season wins of any NBA head coach, 1,390 over 29 seasons, ahead of Don Nelson (1,335) and Lenny Wilkens (1,332). Phil Jackson won the most titles among them, 11.

NBA head coachs by regular-season wins, every club summed
#	Coach	Clubs	Seasons	W-L	Pct	Playoffs	Titles
1	Gregg Popovich	San Antonio Spurs	29	1,390-824	.628	170-114	5
2	Don Nelson	Milwaukee Bucks, Golden State Warriors, New York Knicks, Dallas Mavericks	31	1,335-1,063	.557	75-91
3	Lenny Wilkens	Oklahoma City Thunder, Portland Trail Blazers, Cleveland Cavaliers, Atlanta Hawks, Toronto Raptors, New York Knicks	31	1,332-1,155	.536	80-98	1
4	Larry Brown	Denver Nuggets, Brooklyn Nets, San Antonio Spurs, LA Clippers, Indiana Pacers, Philadelphia 76ers, Detroit Pistons, New York Knicks, Charlotte Hornets	25	1,223-947	.564	113-106	1
5	Jerry Sloan	Chicago Bulls, Utah Jazz	26	1,221-803	.603	98-104
6	Pat Riley	Los Angeles Lakers, New York Knicks, Miami Heat	24	1,210-694	.636	171-111	5
7	Doc Rivers	Orlando Magic, Boston Celtics, LA Clippers, Philadelphia 76ers, Milwaukee Bucks	25	1,194-866	.580	111-107	1
8	George Karl	Cleveland Cavaliers, Golden State Warriors, Oklahoma City Thunder, Milwaukee Bucks, Denver Nuggets, Sacramento Kings	25	1,175-824	.588	80-105
9	Phil Jackson	Chicago Bulls, Los Angeles Lakers	20	1,155-485	.704	229-104	11
10	Rick Adelman	Portland Trail Blazers, Golden State Warriors, Sacramento Kings, Houston Rockets, Minnesota Timberwolves	23	1,042-749	.582	79-78
11	Rick Carlisle	Detroit Pistons, Indiana Pacers, Dallas Mavericks	25	1,012-923	.523	86-87	1
12	Bill Fitch	Cleveland Cavaliers, Boston Celtics, Houston Rockets, Brooklyn Nets, LA Clippers	25	944-1,106	.460	55-54	1
13	Dick Motta	Chicago Bulls, Washington Wizards, Dallas Mavericks, Sacramento Kings, Denver Nuggets	23	935-1,017	.479	56-70	1
14	Jack Ramsay	Philadelphia 76ers, LA Clippers, Portland Trail Blazers, Indiana Pacers	20	864-783	.525	44-58	1
15	Cotton Fitzsimmons	Phoenix Suns, Atlanta Hawks, LA Clippers, Sacramento Kings, San Antonio Spurs	20	832-775	.518	35-49
16	Erik Spoelstra	Miami Heat	19	830-611	.576	110-83	2
17	Red Auerbach	Atlanta Hawks, Boston Celtics	17	823-426	.659	91-60	9
18	Gene Shue	Washington Wizards, Philadelphia 76ers, LA Clippers	21	784-861	.477	30-47
19	Nate McMillan	Oklahoma City Thunder, Portland Trail Blazers, Indiana Pacers, Atlanta Hawks	18	760-668	.532	28-48
20	John MacLeod	Phoenix Suns, Dallas Mavericks, New York Knicks	17	707-657	.518	47-54
21	Red Holzman	Atlanta Hawks, New York Knicks	17	696-604	.535	58-48	2
22	Mike D'Antoni	Denver Nuggets, Phoenix Suns, New York Knicks, Los Angeles Lakers, Houston Rockets	16	672-527	.560	54-56
23	Mike Fratello	Atlanta Hawks, Cleveland Cavaliers, Memphis Grizzlies	16	667-548	.549	20-42
24	Flip Saunders	Minnesota Timberwolves, Detroit Pistons, Washington Wizards	17	654-592	.525	47-51
25	Kevin Loughery	Philadelphia 76ers, Brooklyn Nets, Atlanta Hawks, Chicago Bulls, Washington Wizards, Miami Heat	15	642-746	.463	27-32
26	Chuck Daly	Cleveland Cavaliers, Detroit Pistons, Brooklyn Nets, Orlando Magic	14	638-437	.593	75-51	2
27	Doug Moe	San Antonio Spurs, Denver Nuggets, Philadelphia 76ers	15	628-529	.543	33-50
28	Steve Kerr	Golden State Warriors	13	604-353	.631	104-48	4
29	Tom Thibodeau	Chicago Bulls, Minnesota Timberwolves, New York Knicks	13	578-420	.579	48-55
30	Bobby Leonard	Washington Wizards, Indiana Pacers	6	573-534	.518	69-47
31	Al Attles	Golden State Warriors	13	557-518	.518	30-31	1
32	Del Harris	Houston Rockets, Milwaukee Bucks, Los Angeles Lakers	13	556-457	.549	38-50
33	Stan Van Gundy	Miami Heat, Orlando Magic, Detroit Pistons, New Orleans Pelicans	12	554-425	.566	48-43
34	Alvin Gentry	Miami Heat, Detroit Pistons, LA Clippers, Phoenix Suns, New Orleans Pelicans, Sacramento Kings	16	534-636	.456	17-13
35	Rudy Tomjanovich	Houston Rockets, Los Angeles Lakers	12	527-416	.559	51-39	2
36	Scott Brooks	Oklahoma City Thunder, Washington Wizards	12	521-414	.557	49-48
37	Mike Budenholzer	Atlanta Hawks, Milwaukee Bucks, Phoenix Suns	11	520-363	.589	54-40	1
38	Terry Stotts	Atlanta Hawks, Milwaukee Bucks, Portland Trail Blazers	13	517-486	.515	23-44
39	Michael Malone	Sacramento Kings, Denver Nuggets	11	510-394	.564	44-36	1
40	Mike Brown	Cleveland Cavaliers, Los Angeles Lakers, Sacramento Kings, New York Knicks	11	507-333	.604	66-43	1
41	Quin Snyder	Utah Jazz, Atlanta Hawks	12	504-399	.558	23-34
42	Dwane Casey	Minnesota Timberwolves, Toronto Raptors, Detroit Pistons	14	494-570	.464	21-34
43	Frank Vogel	Indiana Pacers, Orlando Magic, Los Angeles Lakers, Phoenix Suns	12	480-422	.532	48-42	1
44	Scott Skiles	Phoenix Suns, Chicago Bulls, Milwaukee Bucks, Orlando Magic	13	478-480	.499	18-24
45	Alex Hannum	Atlanta Hawks, Philadelphia 76ers, Golden State Warriors, Houston Rockets	12	471-412	.533	47-34	2
46	Billy Donovan	Oklahoma City Thunder, Chicago Bulls	11	469-413	.532	19-27
47	Billy Cunningham	Philadelphia 76ers	8	454-196	.698	66-39	1
48	Byron Scott	Brooklyn Nets, New Orleans Pelicans, Cleveland Cavaliers, Los Angeles Lakers	14	454-647	.412	33-24
49	Doug Collins	Chicago Bulls, Detroit Pistons, Washington Wizards, Philadelphia 76ers	11	442-407	.521	23-33
50	Larry Costello	Milwaukee Bucks, Chicago Bulls	9	430-300	.589	37-23	1

Regular season, every club summed. Clubs carry their names today (the Seattle SuperSonics are the Thunder). From Wikipedia's lists of each club's head coaches.