3rd district
- 3rd District of Columbia Infantry Battalion
- 3rd District of the Wisconsin Assembly
- 3rd Legislative District (New Jersey)
- Ain's 3rd constituency
- Aisne's 3rd constituency
- Alabama House of Representatives, District 3
- Alabama's 3rd congressional district
- Allier's 3rd constituency
- Alpes-Maritimes's 3rd constituency
- Ardennes's 3rd constituency
- Ardèche's 3rd constituency
- Arizona's 3rd congressional district
- Arizona's 3rd legislative district
- Arkansas's 3rd congressional district
- Aube's 3rd constituency
- Aude's 3rd constituency
- Aveyron's 3rd constituency
- Bas-Rhin's 3rd constituency
- Batangas's 3rd congressional district
- Bohol's 3rd congressional district
- Bouches-du-Rhône's 3rd constituency
- Cagayan's 3rd congressional district
- California's 3rd district (disambiguation)
- Calvados's 3rd constituency
- Cavite's 3rd congressional district
- Cebu's 3rd congressional district
- Charente's 3rd constituency
- Charente-Maritime's 3rd constituency
- Cher's 3rd constituency
- Colorado's 3rd Senate district
- Colorado's 3rd congressional district
- Connecticut's 3rd assembly district
- Connecticut's 3rd congressional district
- Côte-d'Or's 3rd constituency
- Côtes-d'Armor's 3rd constituency
- Delaware's 3rd Senate district
- Deux-Sèvres's 3rd constituency
- District 3 (New York City Council)
- District 3 (disambiguation)
- District of the Western Pomerania
- Dordogne's 3rd constituency
- Doubs's 3rd constituency
- Drôme's 3rd constituency
- Essonne's 3rd constituency
- Eure's 3rd constituency
- Eure-et-Loir's 3rd constituency
- Finistère's 3rd constituency
- Florida's 3rd congressional district
- French Polynesia's 3rd constituency
- Fukushima 3rd district
- Gard's 3rd constituency
- Georgia's 3rd Senate district
- Georgia's 3rd congressional district
- Gironde's 3rd constituency
- Guadeloupe's 3rd constituency
- Gunma 3rd district (1947–93)
- Haut-Rhin's 3rd constituency
- Haute-Garonne's 3rd constituency
- Haute-Savoie's 3rd constituency
- Haute-Vienne's 3rd constituency
- Hauts-de-Seine's 3rd constituency
- Hokkaido 3rd district
- Hokkaido 3rd district (1947–1993)
- Hérault's 3rd constituency
- Ille-et-Vilaine's 3rd constituency
- Illinois's 3rd congressional district
- Iloilo's 3rd congressional district
- Indre-et-Loire's 3rd constituency
- Isère's 3rd constituency
- Iwate 3rd district
- Jura's 3rd constituency
- Kagoshima 3rd district
- Kansas's 3rd Senate district
- Kansas's 3rd congressional district
- Kyoto 3rd district
- Kyoto 3rd district (1928–42)
- Landes's 3rd constituency
- Leyte's 3rd congressional district
- Loir-et-Cher's 3rd constituency
- Loire's 3rd constituency
- Loire-Atlantique's 3rd constituency
- Loiret's 3rd constituency
- Lot-et-Garonne's 3rd constituency
- Louisiana's 3rd State Senate district
- Louisiana's 3rd congressional district
- Maine's 3rd congressional district
- Maine-et-Loire's 3rd constituency
- Manche's 3rd constituency
- Manila's 3rd congressional district
- Marne's 3rd constituency
- Martinique's 3rd constituency
- Maryland's 3rd congressional district
- Massachusetts House of Representatives' 3rd Barnstable district
- Massachusetts House of Representatives' 3rd Berkshire district
- Massachusetts House of Representatives' 3rd Bristol district
- Massachusetts House of Representatives' 3rd Essex district
- Massachusetts House of Representatives' 3rd Hampden district
- Massachusetts House of Representatives' 3rd Hampshire district
- Massachusetts House of Representatives' 3rd Middlesex district
- Massachusetts House of Representatives' 3rd Norfolk district
- Massachusetts House of Representatives' 3rd Plymouth district
- Massachusetts House of Representatives' 3rd Suffolk district
- Massachusetts House of Representatives' 3rd Worcester district
- Massachusetts Senate's 3rd Essex district
- Massachusetts Senate's 3rd Middlesex district
- Massachusetts's 3rd congressional district
- Mayenne's 3rd constituency
- Meurthe-et-Moselle's 3rd constituency
- Michigan's 3rd House of Representatives district
- Michigan's 3rd Senate district
- Michigan's 3rd congressional district
- Mie 3rd district
- Minnesota Senate, District 3
- Minnesota's 3rd congressional district
- Mississippi's 3rd congressional district
- Missouri's 3rd congressional district
- Morbihan's 3rd constituency
- Moselle's 3rd constituency
- Nagano 3rd district
- Nebraska's 3rd congressional district
- Nevada's 3rd Senate district
- Nevada's 3rd congressional district
- New Jersey's 3rd congressional district
- New Mexico's 3rd congressional district
- New York's 3rd State Senate district
- New York's 3rd congressional district
- Nièvre's 3rd constituency
- Nord's 3rd constituency
- North Carolina's 3rd congressional district
- Ohio's 3rd congressional district
- Oise's 3rd constituency
- Okinawa 3rd district
- Oklahoma's 3rd congressional district
- Oregon's 3rd State House district
- Oregon's 3rd congressional district
- Orne's 3rd constituency
- Pangasinan's 3rd congressional district
- Paris's 3rd constituency
- Pas-de-Calais's 3rd constituency
- Pennsylvania House of Representatives, District 3
- Pennsylvania Senate, District 3
- Pennsylvania's 3rd congressional district
- Puy-de-Dôme's 3rd constituency
- Pyrénées-Atlantiques's 3rd constituency
- Pyrénées-Orientales's 3rd constituency
- Quezon City's 3rd congressional district
- Quezon's 3rd congressional district
- Rhône's 3rd constituency
- Réunion's 3rd constituency
- Saitama 3rd district
- Samar's 3rd congressional district
- Sarthe's 3rd constituency
- Savoie's 3rd constituency
- Saône-et-Loire's 3rd constituency
- Seine-Maritime's 3rd constituency
- Seine-Saint-Denis's 3rd constituency
- Seine-et-Marne's 3rd constituency
- Somme's 3rd constituency
- South Carolina's 3rd congressional district
- Tarn's 3rd constituency
- Tennessee's 3rd Senate district
- Tennessee's 3rd congressional district
- Texas House of Representatives, District 3
- Texas Senate, District 3
- Texas's 3rd congressional district
- Third constituency for French residents overseas
- Tokyo 3rd district
- Utah's 3rd State Senate district
- Utah's 3rd congressional district
- Val-d'Oise's 3rd constituency
- Val-de-Marne's 3rd constituency
- Var's 3rd constituency
- Vaucluse's 3rd constituency
- Vendée's 3rd constituency
- Vienne's 3rd constituency
- Virginia's 3rd House of Delegates district
- Virginia's 3rd Senate district
- Virginia's 3rd congressional district
- Vosges's 3rd constituency
- Wakayama 3rd district
- Washington's 3rd congressional district
- West Virginia's 3rd Senate district
- West Virginia's 3rd congressional district
- Wisconsin Senate, District 3
- Wisconsin's 3rd congressional district
- Yamaguchi 3rd district
- Yonne's 3rd constituency
- Yvelines's 3rd constituency