In 2017, delegations comprised of 781 international dignitaries representing 114 countries, dependencies, and areas of special sovereignty made official visits to the California State Senate, ranked by number of visitors, they are as follows: | |||
| COUNTRY | # VISITORS | COUNTRY | # VISITORS |
| CHINA | 193 | KYRGYSTAN | 2 |
| JAPAN | 135 | LAOS | 2 |
| MEXICO | 53 | LEBANON | 2 |
| NIGERIA | 30 | LIBYA | 2 |
| BELGIUM | 15 | MALAWI | 2 |
| GHANA | 15 | MOLDOVA | 2 |
| CANADA | 12 | MONGOLIA | 2 |
| CZECH REPUBLIC | 12 | NAMIBIA | 2 |
| GERMANY | 12 | PANAMA | 2 |
| MYANMAR | 12 | POLAND | 2 |
| PAKISTAN | 11 | ROMANIA | 2 |
| UKRAINE | 11 | SERBIA | 2 |
| AUSTRALIA | 10 | TAJIKISTAN | 2 |
| BOLIVIA | 10 | UZBEKISTAN | 2 |
| KENYA | 9 | VIETNAM | 2 |
| DJIBOUTI | 8 | BANGLADESH | 1 |
| EGYPT | 8 | BELIZE | 1 |
| INDIA | 7 | BELIZE | 1 |
| IRAQ | 7 | BOTSWANA | 1 |
| ARGENTINA | 6 | BRAZIL | 1 |
| FRANCE | 6 | BURKINA FASO | 1 |
| TUNISIA | 6 | BURUNDI | 1 |
| UGANDA | 6 | CAMEROON | 1 |
| ALGERIA | 5 | CAPE VERDE | 1 |
| AZERBIJAN | 5 | CHAD | 1 |
| ISRAEL | 5 | COMOROS | 1 |
| MOROCCO | 5 | CROATIA | 1 |
| CAMBODIA | 4 | CYPRUS | 1 |
| CHILE | 4 | D.R. CONGO | 1 |
| CUBA | 4 | DENMARK | 1 |
| ITALY | 4 | ECUADOR | 1 |
| RUSSIA | 4 | FINLAND | 1 |
| SOUTH AFRICA | 4 | GEORGIA | 1 |
| SOUTH KOREA | 4 | GREECE | 1 |
| SPAIN | 4 | GRENADA | 1 |
| SRI LANKA | 4 | GUATEMALA | 1 |
| TANZANIA | 4 | LESOTHO | 1 |
| AFGHANISTAN | 3 | MACEDONIA | 1 |
| BAHRAIN | 3 | MALAYSIA | 1 |
| BULGARIA | 3 | MALI | 1 |
| EL SALVADOR | 3 | MONTENEGRO | 1 |
| IRELAND | 3 | NEW ZEALAND | 1 |
| IVORY COAST | 3 | NIGER | 1 |
| JORDAN | 3 | PAPUA NEW GUINEA | 1 |
| LATVIA | 3 | PORTUGAL | 1 |
| MADAGASCAR | 3 | RWANDA | 1 |
| NEPAL | 3 | SENEGAL | 1 |
| NORWAY | 3 | SEYCHELLES | 1 |
| PALESTINIAN TERRITORIES | 3 | SLOVENIA | 1 |
| SAUDI ARABIA | 3 | SOUTH SUDAN | 1 |
| UNITED KINGDOM | 3 | SUDAN | 1 |
| ZAMBIA | 3 | SWITZERLAND | 1 |
| ALBANIA | 2 | TOGO | 1 |
| ETHIOPIA | 2 | TRINIDAD & TOBAGO | 1 |
| HAITI | 2 | UNITED ARAB EMIRATES | 1 |
| HUNGARY | 2 | VENEZUELA | 1 |
| INDONESIA | 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 |
| International Relations | 333 | Health | 23 |
| Legislative/Government | 249 | Natural Resources/Water | 15 |
| Energy | 90 | Gender | 4 |
| Environment | 69 | Education | 2 |
| Agriculture | 46 | High Technology | 1 |
| International Trade | 44 | ||
Note: As some delegations studied more than one subject, the subject area numbers will not coincide with the number of visitors. | |||