In 2005, delegations comprised of 621 international dignitaries representing 86 countries made official visits to the California Senate. The countries, ranked by number of visitors, were as follows: | |||
| COUNTRY | # VISITORS | COUNTRY | # VISITORS |
| CHINA | 127 | GERMANY | 2 |
| BRAZIL | 67 | JORDAN | 2 |
| JAPAN | 38 | MADAGASCAR | 2 |
| DENMARK | 37 | NORWAY | 2 |
| FRANCE | 26 | OMAN | 2 |
| RUSSIA | 26 | PERU | 2 |
| NEW ZEALAND | 19 | POLAND | 2 |
| NIGERIA | 17 | ROMANIA | 2 |
| FINLAND | 15 | RWANDA | 2 |
| PORTUGAL | 14 | SOUTH KOREA | 2 |
| VIETNAM | 13 | TANZANIA | 2 |
| AFGHANISTAN | 11 | TONGA | 2 |
| MEXICO | 10 | UNITED KINGDOM | 2 |
| PHILIPPINES | 10 | VENEZUELA | 2 |
| AUSTRALIA | 9 | BANGLADESH | 1 |
| AZERBAIJAN | 9 | BARBADOS | 1 |
| KYRGYZSTAN | 9 | BOTSWANA | 1 |
| ARMENIA | 8 | COTE D'IVOIRE | 1 |
| HUNGARY | 8 | CZECH REPUBLIC | 1 |
| ARGENTINA | 7 | GREECE | 1 |
| UZBEKISTAN | 7 | GUATEMALA | 1 |
| INDONESIA | 6 | GUYANA | 1 |
| CANADA | 5 | HONDURAS | 1 |
| GEORGIA | 5 | ICELAND | 1 |
| SOUTH AFRICA | 5 | INDIA | 1 |
| AUSTRIA | 4 | LATVIA | 1 |
| EGYPT | 4 | LUXEMBOURG | 1 |
| ITALY | 4 | MALAYSIA | 1 |
| MOLDOVA | 4 | MALTA | 1 |
| SPAIN | 4 | NAMIBIA | 1 |
| TAJIKISTAN | 4 | NEPAL | 1 |
| TURKEY | 4 | NICARAGUA | 1 |
| BELGIUM | 3 | PAKISTAN | 1 |
| BULGARIA | 3 | PANAMA | 1 |
| CHILE | 3 | SIERRA LEONE | 1 |
| KAZAKHSTAN | 3 | SLOVENIA | 1 |
| NETHERLANDS | 3 | SRI LANKA | 1 |
| SAUDI ARABIA | 3 | SWEDEN | 1 |
| BAHRAIN | 2 | SWITZERLAND | 1 |
| COSTA RICA | 2 | THAILAND | 1 |
| CROATIA | 2 | UGANDA | 1 |
| CYPRUS | 2 | YEMEN | 1 |
| EL SALVADOR | 2 | ZIMBABWE | 1 |
The delegations studied a wide range of subjects, which are ranked below according to the number of visitors who studied them: | |||
| SUBJECT | # VISITORS | SUBJECT | # VISITORS |
| government/political/ legislative process | 258 | environment | 29 |
| protocol/international relations | 205 | transportation | 29 |
| (international) trade/economic development | 141 | energy | 28 |
| California history | 89 | media relations | 6 |
| agriculture | 66 | public safety | 5 |
| (bio) technology | 58 | gender | 4 |
| education | 58 | tribal | 4 |
| budget/fiscal | 37 | immigration | 2 |
| natural resources/water | 32 | ||
Note: As some delegations studied more than one subject, the subject area numbers will not coincide with the number of visitors.