| Radviliškis District Municipality | |
| Native Name: | Radviliškio rajono savivaldybė |
| Native Name Lang: | lt |
| Settlement Type: | Municipality |
| Pushpin Map: | Lithuania |
| Pushpin Image: | Radviliskis in Lithuania.svg |
| Coordinates: | 55.75°N 23.6061°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Lithuania |
| Subdivision Type1: | Ethnographic region |
| Subdivision Name1: | Aukštaitija |
| Subdivision Type2: | County |
| Subdivision Name2: | Šiauliai County |
| Seat Type: | Capital |
| Seat: | Radviliškis |
| Parts Type: | Elderships |
| Parts Style: | para |
| P1: | 13 |
| Leader Title: | Mayor |
| Leader Name: | Antanas Čepononis |
| Leader Title1: | Vice mayor |
| Leader Name1: | Kazimieras Augulis (LSDP) |
| Unit Pref: | Metric |
| Area Total Km2: | 1635 |
| Area Rank: | 11th |
| Population Total: | 34,928 |
| Population As Of: | 2021 |
| Population Rank: | 16th |
| Population Density Km2: | auto |
| Population Density Rank: | 30th |
| Timezone1: | EET |
| Utc Offset1: | +2 |
| Timezone1 Dst: | EEST |
| Utc Offset1 Dst: | +3 |
| Area Code Type: | Telephone code |
| Area Code: | 422 |
| Blank Name Sec1: | Major settlements |
Radviliškis District Municipality (lt|Radviliškio rajono savivaldybė) is one of the seven municipalities of Šiauliai County (Šiaulių apskritis) in Lithuania. Radviliškis town has been its center since 1950.
Radviliškis district has 13 subdivisions or elderships (Seniūnija).
Radviliškis is known for its soft beverages, timber processing, furniture and machinery production industries, sewn and knitted men's and ladies' wear, and the biggest second-hand car market in Northern Lithuania. The district is famous for extracting peat also.
Agriculture is developed in the district because of the high fecundity of the soil. The main agriculture branches are cattle, pigs, sheep breeding, cereal, sugar beets, meat and milk production. The production rates for meat, milk, grain, and sugar beets are among the highest in Lithuania.
Farmers also grow currants and strawberries, breed turkeys and ostriches.
There are 50 educational institutions in Radviliškis District. There are two gymnasiums, five secondary schools, arts, music and sports schools, children's foster in Radviliškis town. Representatives of district's secondary schools develop their leadership skills at the School of Democracy and Social Practice "Ateitis".
At the Lithuanian Rehabilitation Vocational Training center, disabled youths can get occupational training. The Center positively cooperates with foreign partners, changes places with delegations of schoolchildren, and pursues international projects.
From Radviliškis, it is:
Today Radviliškis is actively cooperating with foreign countries. The municipality expands international cooperation in the fields of municipal affairs, health care, social security, ecology, monument preservation, tourism, culture and education. The district is connected with:
There are many places of interest in Radviliškis district, such as: