| Rank | Country | Radio broadcast stations FM density |
192 | San Marino |  9,991 people per FM Radio broadcast station |
152 | Sao Tome and Principe |  41,236 people per FM Radio broadcast station |
40 | Saudi Arabia |  908,433 people per FM Radio broadcast station |
54 | Senegal |  642,663 people per FM Radio broadcast station |
| Serbia |  void |
| Serbia and Montenegro | void |
123 | Seychelles |  82,247 people per FM Radio broadcast station |
49 | Sierra Leone |  699,420 people per FM Radio broadcast station |
76 | Singapore |  271,069 people per FM Radio broadcast station |
128 | Slovakia |  69,942 people per FM Radio broadcast station |
194 | Slovenia |  8,730 people per FM Radio broadcast station |
57 | Solomon Islands |  581,318 people per FM Radio broadcast station |
43 | Somalia |  868,970 people per FM Radio broadcast station |
113 | South Africa |  126,185 people per FM Radio broadcast station |
| South Georgia and the South Sandwich Islands | void |
| Southern Ocean | void |
138 | Spain |  56,631 people per FM Radio broadcast station |
| Spratly Islands | void |
63 | Sri Lanka |  406,323 people per FM Radio broadcast station |
1 | Sudan |  40,218,455 people per FM Radio broadcast station |
155 | Suriname |  36,616 people per FM Radio broadcast station |
210 | Svalbard |  2,165 people per FM Radio broadcast station |
59 | Swaziland |  564,407 people per FM Radio broadcast station |
157 | Sweden |  34,134 people per FM Radio broadcast station |
130 | Switzerland |  67,094 people per FM Radio broadcast station |
9 | Syria |  9,873,793 people per FM Radio broadcast station |
119 | Taiwan |  100,092 people per FM Radio broadcast station |
48 | Tajikistan |  721,189 people per FM Radio broadcast station |
18 | Tanzania |  3,655,742 people per FM Radio broadcast station |
94 | Thailand |  186,591 people per FM Radio broadcast station |
| Timor-Leste |  void |