The United States of America is currently made up of 50 states and they officially joined the union over a period of 172 years. Here are some interesting statistics about states admitted to the union:
Most common day of the month to join the union: 1st of the month (five states)
Most common month to join the union: December (nine states)
Least common month to join the union: September and October (one admission each)
Only two states were admitted on exactly the same date: North and South Dakota (2 November 1889)
Admission dates that coincide with U.S. holidays:
Oregon and Arizona were admitted on Valentine’s Day (14 February)
Nevada was admitted on Halloween (31 October)
Washington was admitted on Veteran’s Day (11 November)
Most admissions in one particular month: November 1889 (four)
Year with the most admissions: 1788 (eight)
Here are two charts showing the dates when each state was admitted to the US. The first chart lists them in order of admission date. In the second chart, they are organized in alphabetical order.
sorted by date
#
State
Admission Date
1
Delaware
7 December 1787
2
Pennsylvania
12 December 1787
3
New Jersey
18 December 1787
4
Georgia
2 January 1788
5
Connecticut
9 January 1788
6
Massachusetts
6 February 1788
7
Maryland
28 April 1788
8
South Carolina
23 May 1788
9
New Hampshire
21 June 1788
10
Virginia
25 June 1788
11
New York
26 July 1788
12
North Carolina
21 November 1789
13
Rhode Island
29 May 1790
14
Vermont
4 March 1791
15
Kentucky
1 June 1792
16
Tennessee
1 June 1796
17
Ohio
1 March 1803
18
Louisiana
30 April 1812
19
Indiana
11 December 1816
20
Mississippi
10 December 1817
21
Illinois
3 December 1818
22
Alabama
14 December 1819
23
Maine
15 March 1820
24
Missouri
10 August 1821
25
Arkansas
15 June 1836
26
Michigan
26 January 1837
27
Florida
3 March 1845
28
Texas
29 December 1845
29
Iowa
28 December 1846
30
Wisconsin
29 May 1848
31
California
9 September 1850
32
Minnesota
11 May 1858
33
Oregon
14 February 1859
34
Kansas
29 January 1861
35
West Virginia
20 June 1863
36
Nevada
31 October 1864
37
Nebraska
1 March 1867
38
Colorado
1 August 1876
39
North Dakota
2 November 1889
40
South Dakota
2 November 1889
41
Montana
8 November 1889
42
Washington
11 November 1889
43
Idaho
3 July 1890
44
Wyoming
10 July 1890
45
Utah
4 January 1896
46
Oklahoma
16 November 1907
47
New Mexico
6 January 1912
48
Arizona
14 February 1912
49
Alaska
3 January 1959
50
Hawaii
21 August 1959
#
State
Admission Date
sorted by state
#
State
Admission Date
22
Alabama
14 December 1819
49
Alaska
3 January 1959
48
Arizona
14 February 1912
25
Arkansas
15 June 1836
31
California
9 September 1850
38
Colorado
1 August 1876
5
Connecticut
9 January 1788
1
Delaware
7 December 1787
27
Florida
3 March 1845
4
Georgia
2 January 1788
50
Hawaii
21 August 1959
43
Idaho
3 July 1890
21
Illinois
3 December 1818
19
Indiana
11 December 1816
29
Iowa
28 December 1846
34
Kansas
29 January 1861
15
Kentucky
1 June 1792
18
Louisiana
30 April 1812
23
Maine
15 March 1820
7
Maryland
28 April 1788
6
Massachusetts
6 February 1788
26
Michigan
26 January 1837
32
Minnesota
11 May 1858
20
Mississippi
10 December 1817
24
Missouri
10 August 1821
41
Montana
8 November 1889
37
Nebraska
1 March 1867
36
Nevada
31 October 1864
9
New Hampshire
21 June 1788
3
New Jersey
18 December 1787
47
New Mexico
6 January 1912
11
New York
26 July 1788
12
North Carolina
21 November 1789
39
North Dakota
2 November 1889
17
Ohio
1 March 1803
46
Oklahoma
16 November 1907
33
Oregon
14 February 1859
2
Pennsylvania
12 December 1787
13
Rhode Island
29 May 1790
8
South Carolina
23 May 1788
40
South Dakota
2 November 1889
16
Tennessee
1 June 1796
28
Texas
29 December 1845
45
Utah
4 January 1896
14
Vermont
4 March 1791
10
Virginia
25 June 1788
42
Washington
11 November 1889
35
West Virginia
20 June 1863
30
Wisconsin
29 May 1848
44
Wyoming
10 July 1890
#
State
Admission Date