| Kazlų Rūda Municipality | |
| Native Name: | Kazlų Rūdos savivaldybė |
| Native Name Lang: | lt |
| Settlement Type: | Municipality |
| Image Map1: | KazluRudosSeniunijos.png |
| Map Caption1: | Map of Kazlų Rūda municipality |
| Subdivision Type: | Country |
| Subdivision Name: |  Lithuania |
| Subdivision Type1: | Ethnographic region |
| Subdivision Name1: | Suvalkija |
| Subdivision Type2: | County |
| Subdivision Name2: | Marijampolė County |
| Parts Style: | para |
| Parts Type: | Elderships |
| P1: | 4 |
| Seat Type: | Capital |
| Seat: | Kazlų Rūda |
| Unit Pref: | Metric |
| Area Total Km2: | 555 |
| Area Rank: | 46th |
| Population Footnotes: | [1] |
| Population Total: | 11,054 |
| Population As Of: | 2021 [2] |
| Population Rank: | 55th |
| Population Density Km2: | auto |
| Population Density Rank: | 38th |
| Timezone1: | EET |
| Utc Offset1: | +2 |
| Timezone1 Dst: | EEST |
| Utc Offset1 Dst: | +3 |
| Area Code Type: | Telephone code |
| Area Code: | 343 |
| Blank Name Sec1: | Major settlements |
Kazlų Rūda Municipality is one of 60 municipalities in Lithuania.
Kazlų Rūda Municipality is divided into 4 elderships:[3]
| Eldership (Administrative Center) | Area | Population (2021) | |
|---|---|---|---|
| Antanavas (Antanavas) | 19km2 | 693 | |
| Jankai (Jankai) | 169km2 | 904 | |
| Kazlų Rūda (Kazlų Rūda) | 360km2 | 3,282 | |
| Plutiškės (Plutiškės) | 30km2 | 585 |