NCAA Division I-A football team records by decade

Rank	School	Winning percentage	Wins	Losses
1	Oklahoma	.853	81	14
2	Boise State	.846	77	14
2	Texas	.846	77	14
4	Ohio State	.809	72	17
5	Miami	.807	71	17
6	USC	.789	71	19
7	Louisiana State	.778	70	20
8	Louisville	.775	69	20
9	Virginia Tech	.767	69	21
10	Georgia	.758	69	22

1990s

Rank	School	Winning percentage	Wins	Losses	Ties
1	Florida State	.890	109	13	1
2	Nebraska	.868	108	16	1
3	Marshall	.820	114	25	0
4	Florida	.820	102	22	1
5	Tennessee	.813	99	22	2
6	Penn State	.789	97	26	0
7	Michigan	.775	93	26	3
8	Miami	.773	92	27	0
9	Texas A&M	.766	94	28	2
10	Ohio State	.752	91	29	3

Rank	School	Winning percentage	Wins	Losses	Ties
1	Nebraska	.837	102	20	0
2	Miami	.831	98	20	0
3	Brigham Young	.797	102	26	0
4	Oklahoma	.780	91	25	2
5	Clemson	.765	86	25	4
6	Penn State	.763	89	27	2
7	Georgia	.756	88	27	4
8	Florida State	.750	87	28	3
9	Michigan	.750	89	29	2
10	Auburn	.733	86	31	1

Rank	School	Winning percentage	Wins	Losses	Ties
1	Oklahoma	.877	102	13	3
2	Alabama	.863	103	16	1
3	Michigan	.848	96	16	3
4	Tennessee State	.827	85	17	2
5	Nebraska	.820	98	20	4
6	Penn State	.814	96	22	0
7	Ohio State	.811	91	20	3
8	Notre Dame	.805	91	22	0
9	USC	.803	93	21	5
10	Texas	.770	88	26	1

Teams have reached 100 wins in a decade 8 times. This has happened twice in the 1970s, twice in the 1980s, and four times in the 1990s. One of the reasons for more in later decades, is because the college football season has expanded, to allow more games to be played.
Oklahoma became the first team to reach 100 victories in a decade.
Nebraska became the first team to reach 100 victories in back-to-back decades, when they did so in the 1980s and 1990s.
Florida State set the NCAA record for winning percentage in a decade at .890 in the 1990s.
Marshall set the NCAA record for victories in a decade with 114, but that was because they had longer seasons.
Michigan holds the NCAA record for most victories all time
Notre Dame has the most victories since 1900
Oklahoma has the most victories since WW2
Nebraska has the most victories since 1970
Oklahoma has the most victories since 2000