In 2019, delegations comprised of 634 international dignitaries representing 100 countries, dependencies, and areas of special sovereignty made official visits to the California State Senate, ranked by number of visitors, they are as follows:
| JAPAN | 120 | CYPRUS | 2 |
| CHINA | 81 | DENMARK | 2 |
| MEXICO | 30 | DOMINICAN REPUBLIC | 2 |
| INDONESIA | 28 | ECUADOR | 2 |
| BRAZIL | 19 | EL SALVADOR | 2 |
| SPAIN | 18 | MACEDONIA | 2 |
| SWEDEN | 17 | MARSHALL ISLANDS | 2 |
| CANADA | 16 | PARAGUAY | 2 |
| PAKISTAN | 13 | PORTUGAL | 2 |
| INDIA | 12 | QATAR | 2 |
| NEW ZEALAND | 12 | SERBIA | 2 |
| UKRAINE | 11 | SOUTH AFRICA | 2 |
| AUSTRIA | 10 | TUNISIA | 2 |
| SOUTH KOREA | 10 | AZERBAIJAN | 1 |
| AUSTRALIA | 9 | BARBADOS | 1 |
| IRAQ | 9 | BELARUS | 1 |
| ISRAEL | 9 | BOLIVIA | 1 |
| ITALY | 9 | BOSNIA & HERZEGOVINA | 1 |
| MOROCCO | 9 | BURKINA FASO | 1 |
| POLAND | 9 | CAMBODIA | 1 |
| FRANCE | 8 | CHILE | 1 |
| GEORGIA | 7 | CROATIA | 1 |
| KAZAKHSTAN | 7 | CUBA | 1 |
| IRELAND | 5 | CZECH REPUBLIC | 1 |
| PHILIPPINES | 5 | FIJI | 1 |
| ROMANIA | 5 | FINLAND | 1 |
| UNITED ARAB EMIRATES | 5 | FRENCH POLYNESIA | 1 |
| UNITED KINGDOM | 5 | GERMANY | 1 |
| UZBEKISTAN | 5 | GHANA | 1 |
| ARGENTINA | 4 | HONDURAS | 1 |
| BANGLADESH | 4 | KENYA | 1 |
| BELGIUM | 4 | KOSOVO | 1 |
| COLOMBIA | 4 | LATVIA | 1 |
| ETHIOPIA | 4 | LITHUANIA | 1 |
| GREECE | 4 | MALAWI | 1 |
| HUNGARY | 4 | MICRONESIA | 1 |
| MONTENEGRO | 4 | MONGOLIA | 1 |
| NETHERLANDS | 4 | MOZAMBIQUE | 1 |
| TAJIKISTAN | 4 | MYANMAR | 1 |
| EGYPT | 3 | PAPUA NEW GUINEA | 1 |
| ESTONIA | 3 | PERU | 1 |
| SLOVAKIA | 3 | SINGAPORE | 1 |
| TURKEY | 3 | SLOVENIA | 1 |
| TURKMENISTAN | 3 | SWITZERLAND | 1 |
| UGANDA | 3 | THAILAND | 1 |
| AFGHANISTAN | 3 | TONGA | 1 |
| ALBANIA | 3 | VENEZUELA | 1 |
| ARMENIA | 3 | VIETNAM | 1 |
| BUGARIA | 3 | ZAMBIA | 1 |
| COSTA RICA | 3 | 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/Protocol | 325 | Energy | 19 |
| Legislative/Government | 159 | Environment | 19 |
| Education | 33 | Transportation | 11 |
| High Tech | 32 | InternationalTrade/Economic Development | 8 |
| Agriculture | 25 | Emplyment/Retirement | 6 |
| Budget/Fiscal | 25 | Natural Sources/Water | 1 |
| Judiciary | 21 | Housing | 1 |
| Public Safety | 21 | Social Services | 1 |
| Health | 20 | ||
Note: As some delegations studied more than one subject, the subject area numbers will not coincide with the number of visitors. | |||