美國國會席次分配

upright=1.8|thumb|2010年人口普查之后美国各州国会众议院席次分配
upright=1.8|thumb|2000年人口普查之后美国各州国会众议院席次分配
upright=1.8|thumb|1789-2020年美国各州席次分配占比
美國國會席次分配（）是根據《美国宪法》規定，依照十年一次的美國人口普查，將美國眾議院席位分配到50個州的過程。《憲法》保障每個州至少有一個席位，而每個州的實際席位，大致相當於它在50個州的總人口中所佔的份額。不过，华盛顿特区和美国领地人口不计入其中。

自《美国宪法》通过以来，美国前后共采取过5种国会席位分配方式。除了要求每个州在众议院至少有一名众议员外，各州的众议员人数原则上与该州的人口成正比。自1913年以來，眾議院的投票席位一直為435個，1929年的《重新分配法案》確定了這一數字。自1940年人口普查之后，国会就一直以亨廷顿-希尔法分配席位。

美國參議院則不受此影響，因為每個州都固定分配兩個席位。

+ 2010-2019年美国众议院人口以及席位分配占比州人口占比席位占比 2019201020192019年的数字是根据估计的人口数据计算出来的2010 12.06%12.09%11.95%12.18%8.85%8.16%8.74%8.28%6.56%6.10%6.44%6.21%5.94%6.29%5.98%6.21%3.91%4.12%3.91%4.14%3.87%4.16%3.91%4.14%3.57%3.74%3.68%3.68%3.24%3.14%3.22%3.22%3.20%3.09%3.22%2.99%3.05%3.21%2.99%3.22%2.71%2.85%2.76%2.76%2.61%2.60%2.53%2.53%2.32%2.18%2.30%2.30%2.22%2.07%2.30%2.07%2.10%2.12%2.07%2.07%2.09%2.06%2.07%2.07%2.06%2.10%2.07%2.07%1.87%1.94%1.84%1.84%1.85%1.87%1.84%1.84%1.78%1.85%1.84%1.84%1.76%1.63%1.84%1.61%1.72%1.72%1.61%1.84%1.57%1.50%1.61%1.61%1.50%1.55%1.61%1.61%1.42%1.47%1.38%1.38%1.36%1.41%1.38%1.38%1.29%1.24%1.38%1.15%1.21%1.22%1.15%1.15%1.09%1.16%1.15%1.15%0.98%0.90%0.92%0.92%0.96%0.99%0.92%0.92%0.94%0.88%0.92%0.92%0.92%0.95%0.92%0.92%0.91%0.96%0.92%0.92%0.89%0.93%0.92%0.92%0.64%0.67%0.69%0.69%0.59%0.59%0.69%0.69%0.55%0.60%0.46%0.69%0.55%0.51%0.46%0.46%0.43%0.44%0.46%0.46%0.42%0.43%0.46%0.46%0.41%0.43%0.46%0.46%0.33%0.32%0.46%0.23%0.32%0.34%0.23%0.46%0.30%0.29%0.23%0.23%0.27%0.26%0.23%0.23%0.23%0.22%0.23%0.23%0.22%0.23%0.23%0.23%0.19%0.20%0.23%0.23%0.18%0.18%0.23%0.23%

 參考資料 

Category:美国众议院
Category:美國國會選區
Category:美国人口普查