I haven't kept a record of home fans only figures unfortunately.
The Nolan play off season (regular league games only)......
2017/18 League Attendances
1. Sat 3/Feb/2018 17,274 v Crewe Alexandra
2. Sat 7/Oct/2017 13,267 v Forest Green Rovers
3. Sat 17/Mar/2018 12,563 v Mansfield Town
4. Sat 5/May/2018 12,184 v Luton Town
5. Sat 23/Sep/2017 11,672 v Lincoln City
6. Sat 7/Apr/2018 10,316 v Coventry City
7. Fri 30/Mar/2018 8,038 v Wycombe Wanderers
8. Sat 16/Dec/2017 8,016 v Grimsby Town
9. Sat 21/Apr/2018 7,359 v Yeovil Town
10. Mon 1/Jan/2018 7,214 v Port Vale
11. Sat 12/Aug/2017 7,021 v Chesterfield
12. Sat 25/Nov/2017 6,770 v Colchester United
13. Sat 20/Jan/2018 6,677 v Exeter City
14. Sat 23/Dec/2017 6,102 v Cambridge United
15. Fri 25/Aug/2017 6,087 v Accrington Stanley
16. Sat 28/Oct/2017 6,019 v Newport County
17. Sat 18/Nov/2017 5,809 v Cheltenham Town
18. Sat 14/Oct/2017 5,804 v Barnet
19. Sat 24/Feb/2018 5,684 v Stevenage
20. Sat 9/Sep/2017 5,305 v Morecambe
21. Tue 12/Sep/2017 5,107 v Swindon Town
22. Tue 13/Feb/2018 3,889 v Carlisle United
23. Tue 23/Jan/2018 3,738 v Crawley Town
Total Games: 23
Average: 7,909
That was the 4th best in the league that season....
1. COVENTRY CITY 9,255
2. LINCOLN CITY 8,782
3. LUTON TOWN 8,676
4. NOTTS COUNTY 7,909
5. SWINDON TOWN 6,380
6. CHESTERFIELD 5,354
7. WYCOMBE W. 4,705
8. GRIMSBY TOWN 4,658
9. CARLISLE UTD 4,609
10. PORT VALE 4,583
11. CAMBRIDGE UTD 4,523
12. MANSFIELD T. 4,309
13. EXETER CITY 4,005
14. CREWE ALEX. 3,876
15. NEWPORT CO. 3,489
16. COLCHESTER U. 3,321
17. CHELTENHAM T. 3,172
18. YEOVIL TOWN 2,941
19. FOREST GREEN 2,772
20. STEVENAGE 2,611
21. CRAWLEY TOWN 2,268
22. BARNET 2,113
23. ACCRINGTON S. 1,979
24. MORECAMBE 1,492
Average : 4,491
Notts attendances were the 57th best in the 92.