Category:Counties in the United States by decade

• Counties in the United States in the 1790s‎ (1 C)
• Counties in the United States in the 1800s‎ (2 C)
• Counties in the United States in the 1810s‎ (3 C)
• Counties in the United States in the 1820s‎ (2 C)
• Counties in the United States in the 1830s‎ (1 C)
• Counties in the United States in the 1840s‎ (2 C)
• Counties in the United States in the 1850s‎ (2 C)
• Counties in the United States in the 1860s‎ (8 C)
• Counties in the United States in the 1870s‎ (3 C)
• Counties in the United States in the 1880s‎ (4 C)
• Counties in the United States in the 1890s‎ (11 C)
• Counties in the United States in the 1900s‎ (21 C)
• Counties in the United States in the 1910s‎ (23 C)
• Counties in the United States in the 1920s‎ (22 C)
• Counties in the United States in the 1930s‎ (28 C)
• Counties in the United States in the 1940s‎ (24 C)
• Counties in the United States in the 1950s‎ (14 C)
• Counties in the United States in the 1960s‎ (10 C)
• Counties in the United States in the 1970s‎ (23 C)
• Counties in the United States in the 1980s‎ (21 C)
• Counties in the United States in the 1990s‎ (21 C)
• Counties in the United States in the 2000s‎ (34 C, 1 F)
• Counties in the United States in the 2010s‎ (37 C)
• Counties in the United States in the 2020s‎ (35 C)

A

• Acadia Parish, Louisiana by decade‎ (8 C)
• Alpine County, California by decade‎ (1 C)
• Arlington County, Virginia by decade‎ (12 C)
• Ascension Parish, Louisiana by decade‎ (9 C)
• Assumption Parish, Louisiana by decade‎ (3 C)

B

• Broward County, Florida by decade‎ (11 C)

C

• Calcasieu Parish, Louisiana by decade‎ (9 C)
• Cameron Parish, Louisiana by decade‎ (4 C)
• Cecil County, Maryland by decade‎ (4 C)

E

• East Baton Rouge Parish, Louisiana by decade‎ (17 C)
• East Carroll Parish, Louisiana by decade‎ (10 C)
• Erie County, New York by decade‎ (23 C)
• Evangeline Parish, Louisiana by decade‎ (10 C)

F

• Frederick County, Maryland by decade‎ (1 C)

H

• Harford County, Maryland by decade‎ (5 C)

I

• Iberia Parish, Louisiana by decade‎ (12 C)

J

• Jefferson Parish, Louisiana by decade‎ (13 C)

L

• Lafourche Parish, Louisiana by decade‎ (13 C)
• Livingston Parish, Louisiana by decade‎ (4 C)

M

• Miami-Dade County, Florida by decade‎ (4 C)
• Monroe County, Florida by decade‎ (2 C)
• Montgomery County, Maryland by decade‎ (24 C)

N

• Natchitoches Parish, Louisiana by decade‎ (6 C)

O

• Okaloosa County, Florida by decade‎ (8 C)

P

• Palm Beach County, Florida by decade‎ (14 C)
• Pinellas County, Florida by decade‎ (4 C)
• Plaquemines Parish, Louisiana by decade‎ (21 C)
• Pointe Coupee Parish, Louisiana by decade‎ (7 C)
• Prince George's County, Maryland by decade‎ (15 C)

R

• Rapides Parish, Louisiana by decade‎ (8 C)
• Red River Parish, Louisiana by decade‎ (2 C)

S

• Sabine Parish, Louisiana by decade‎ (1 C)
• Saint Bernard Parish, Louisiana by decade‎ (18 C)
• Saint Charles Parish, Louisiana by decade‎ (9 C)
• Saint John the Baptist Parish, Louisiana by decade‎ (9 C)
• Saint Landry Parish, Louisiana by decade‎ (12 C)
• Saint Martin Parish, Louisiana by decade‎ (11 C)
• Saint Mary Parish, Louisiana by decade‎ (10 C)
• Saint Tammany Parish, Louisiana by decade‎ (12 C)
• Santa Rosa County, Florida by decade‎ (6 C)
• St. Louis County, Missouri by decade‎ (1 C)

T

• Tangipahoa Parish, Louisiana by decade‎ (8 C)
• Terrebonne Parish, Louisiana by decade‎ (8 C)

V

• Vermilion Parish, Louisiana by decade‎ (2 C)

W

• Washington Parish, Louisiana by decade‎ (10 C)
• Webster Parish, Louisiana by decade‎ (9 C)
• West Carroll Parish, Louisiana by decade‎ (1 C)
• West Feliciana Parish, Louisiana by decade‎ (7 C)
• Winn Parish, Louisiana by decade‎ (2 C)