Big Brother 1999 was een interressant gebeuren. Vooral het nieuwe concept van het programma en de combinatie met het Internet zorgde voor een hype. Om enig idee te geven van de populariteit van het programma worden hieronder de kijkdichtheidscijfers weergegeven (bron: Intomart). Om de veelheid aan cijfers iets te beperken zijn de herhalingen weggelaten.
Grote uitzendingen op donderdag avond
| Datum | Kdh 6+ | Kdh 6-12 | Kdh BDS2049 | Kijkers * 1000 |
| 16/9/1999 | 8.1 | | | 1144 |
| 23/9/1999 | 8.4 | 0.2 | 12.9 | 1186 |
| 30/9/1999 | 8.8 | 0.0 | 13.0 | 1243 |
| 7/10/1999 | 8.9 | 0.3 | 14.0 | 1257 |
| 14/10/1999 | 8.5 | 0.9 | 13.0 | 1200 |
| 21/10/1999 | 14.0 | 2.0 | 21.7 | 1977 |
| 28/10/1999 | 12.5 | 1.9 | 19.6 | 1765 |
| 4/11/1999 | 11.3 | 0.3 | 18.3 | 1596 |
| 11/11/1999 | 14.9 | 1.5 | 23.1 | 2104 |
| 18/11/1999 | 11.9 | 0.8 | 19.0 | 1680 |
| 25/11/1999 | 14.9 | 2.0 | 23.5 | 2104 |
| 2/12/1999 | 11.3 | 1.0 | 17.9 | 1596 |
| 9/12/1999 | 14.1 | 0.8 | 22.4 | 1991 |
| 16/12/1999 | 11.5 | 0.9 | 18.4 | 1624 |
| 23/12/1999 | | | | |
| 30/12/1999 | 25.1 | 10.7 | 32.0 | 3544 |
Normale uitzendingen op werkdagen
| Datum | Kdh 6+ | Kdh 6-12 | Kdh BDS2049 | Kijkers * 1000 |
| 17/9/1999 | 6.5 | | | 918 |
| 20/9/1999 | 5.7 | 1.8 | 8.4 | 805 |
| 21/9/1999 | 5.1 | 1.0 | 8.1 | 720 |
| 22/9/1999 | 4.6 | 1.6 | 6.8 | 650 |
| 23/9/1999 | 5.4 | 3.1 | 7.3 | 762 |
| 24/9/1999 | 5.5 | 3.7 | 7.7 | 777 |
| 27/9/1999 | 6.0 | 2.0 | 9.5 | 847 |
| 28/9/1999 | 6.7 | 2.2 | 10.7 | 946 |
| 29/9/1999 | 6.3 | 3.1 | 10.0 | 890 |
| 30/9/1999 | 5.9 | 3.4 | 8.4 | 833 |
| 1/10/1999 | 7.1 | 5.8 | 9.0 | 1003 |
| 4/10/1999 | 7.5 | 3.4 | 11.1 | 1059 |
| 5/10/1999 | 7.6 | 2.9 | 11.0 | 1073 |
| 6/10/1999 | 7.1 | 2.3 | 10.9 | 1003 |
| 7/10/1999 | 7.5 | 3.5 | 12.8 | 1059 |
| 8/10/1999 | 7.6 | 3.4 | 10.4 | 1073 |
| 11/10/1999 | 7.8 | 3.1 | 10.3 | 1101 |
| 12/10/1999 | 7.7 | 3.8 | 10.3 | 1087 |
| 13/10/1999 | 7.5 | 3.7 | 11.3 | 1059 |
| 14/10/1999 | 6.9 | 3.0 | 10.9 | 974 |
| 15/10/1999 | 6.7 | 4.0 | 8.8 | 946 |
| 18/10/1999 | 10.1 | 4.9 | 14.9 | 1426 |
| 19/10/1999 | 8.1 | 6.3 | 11.7 | 1144 |
| 20/10/1999 | 9.5 | 4.9 | 14.7 | 1341 |
| 21/10/1999 | 11.1 | 5.5 | 15.6 | 1567 |
| 22/10/1999 | 11.8 | 6.8 | 15.9 | 1666 |
| 25/10/1999 | 10.5 | 6.3 | 15.4 | 1483 |
| 26/10/1999 | 10.6 | 5.5 | 15.9 | 1497 |
| 27/10/1999 | 10.2 | 5.4 | 15.2 | 1440 |
| 28/10/1999 | 8.7 | 6.7 | 13.3 | 1228 |
| 29/10/1999 | 11.2 | 5.9 | 15.6 | 1581 |
| 1/11/1999 | 11.1 | 9.1 | 16.6 | 1567 |
| 2/11/1999 | 11.8 | 9.6 | 16.9 | 1666 |
| 3/11/1999 | 10.7 | 9.2 | 14.6 | 1511 |
| 4/11/1999 | 11.7 | 11.1 | 17.0 | 1652 |
| 5/11/1999 | 10.0 | 8.3 | 14.3 | 1412 |
| 8/11/1999 | 12.7 | 9.4 | 18.4 | 1793 |
| 9/11/1999 | 10.2 | 8.9 | 14.5 | 1440 |
| 10/11/1999 | 11.0 | 9.6 | 16.1 | 1553 |
| 11/11/1999 | 10.9 | 7.5 | 16.5 | 1539 |
| 12/11/1999 | 10.9 | 11.6 | 13.3 | 1539 |
| 15/11/1999 | 11.2 | 7.0 | 14.9 | 1581 |
| 16/11/1999 | 11.1 | 8.9 | 15.7 | 1567 |
| 17/11/1999 | 11.4 | 9.0 | 16.2 | 1610 |
| 18/11/1999 | 10.6 | 7.2 | 15.4 | 1497 |
| 19/11/1999 | 10.3 | 8.9 | 15.4 | 1454 |
| 22/11/1999 | 12.6 | 9.1 | 18.2 | 1779 |
| 23/11/1999 | 10.4 | 7.4 | 15.3 | 1468 |
| 24/11/1999 | 10.6 | | | 1496 |
| 25/11/1999 | 11.0 | 7.7 | 15.6 | 1553 |
| 26/11/1999 | 9.7 | 8.2 | 11.7 | 1370 |
| 29/11/1999 | 10.6 | 5.0 | 16.5 | 1497 |
| 30/11/1999 | 10.0 | 4.6 | 16.2 | 1412 |
| 1/12/1999 | 10.2 | 6.2 | 15.0 | 1440 |
| 2/12/1999 | 9.0 | 4.7 | 13.8 | 1271 |
| 3/12/1999 | 9.6 | 8.2 | 14.5 | 1356 |
| 6/12/1999 | 11.5 | 5.6 | 18.2 | 1624 |
| 7/12/1999 | 10.7 | 6.9 | 16.7 | 1511 |
| 8/12/1999 | 11.3 | 6.8 | 16.6 | 1596 |
| 9/12/1999 | 11.0 | 10.3 | 16.5 | 1553 |
| 10/12/1999 | 9.9 | 10.6 | 13.5 | 1398 |
| 13/12/1999 | 10.3 | 5.3 | 14.4 | 1454 |
| 14/12/1999 | 11.0 | 10.6 | 16.3 | 1553 |
| 15/12/1999 | 11.6 | 7.4 | 18.9 | 1638 |
| 16/12/1999 | 10.4 | 7.9 | 16.6 | 1468 |
| 17/12/1999 | 10.1 | 10.5 | 13.7 | 1426 |
| 20/12/1999 | 12.8 | 9.7 | 19.9 | 1807 |
| 21/12/1999 | | | | |
| 22/12/1999 | | | | |
| 23/12/1999 | | | | |
| 24/12/1999 | | | | |
| 27/12/1999 | | | | |
| 28/12/1999 | 13.1 | 7.7 | 19.6 | 1850 |
| 29/12/1999 | 12.4 | 8.0 | 16.7 | 1751 |
| 30/12/1999 | 14.9 | 15.5 | 18.5 | 2104 |
Normale uitzendingen op zaterdag
| Datum | Kdh 6+ | Kdh 6-12 | Kdh BDS2049 | Kijkers * 1000 |
| 6/11/1999 | 8.6 | 9.1 | 10.6 | 1214 |
| 13/11/1999 | 6.4 | 5.3 | 9.3 | 904 |
| 20/11/1999 | 7.8 | 3.5 | 11.3 | 1101 |
| 27/11/1999 | 7.1 | 5.5 | 9.8 | 1003 |
| 4/12/1999 | 5.0 | 2.7 | 7.5 | 706 |
| 11/12/1999 | 5.6 | 2.4 | 7.4 | 791 |
| 18/12/1999 | | | | |
| 25/12/1999 | 7.3 | 3.1 | 6.3 | 1031 |
Weekcompilaties op zondag
| Datum | Kdh 6+ | Kdh 6-12 | Kdh BDS2049 | Kijkers * 1000 |
| 19/9/1999 | 6.1 | 1.6 | 8.9 | 861 |
| 26/9/1999 | 6.2 | 3.1 | 8.2 | 875 |
| 3/10/1999 | 6.4 | 4.6 | 8.3 | 904 |
| 10/10/1999 | 7.0 | 4.2 | 8.6 | 988 |
| 17/10/1999 | 6.7 | 1.8 | 8.2 | 946 |
| 24/10/1999 | 7.9 | 3.3 | 10.3 | 1115 |
| 31/10/1999 | 10.8 | 7.0 | 14.3 | 1525 |
| 7/11/1999 | 8.1 | 4.7 | 10.9 | 1144 |
| 14/11/1999 | 8.4 | 8.1 | 10.8 | 1186 |
| 21/11/1999 | 9.0 | 7.2 | 11.6 | 1271 |
| 28/11/1999 | 9.0 | 7.2 | 11.6 | 1271 |
| 5/12/1999 | 6.1 | 3.7 | 8.0 | 861 |
| 12/12/1999 | 8.2 | 4.5 | 9.8 | 1158 |
| 19/12/1999 | | | | |
| 26/12/1999 | 5.3 | 3.5 | 5.5 | 748 |
Extra uitzendingen
| Datum | Kdh 6+ | Kdh 6-12 | Kdh BDS2049 | Kijkers * 1000 |
| 19/9/1999 | 3.5 | 1.2 | 4.5 | 494 |
| 1/11/1999 | 11.4 | 7.8 | 15.7 | 1610 |
