diff --git a/EasyGA/structure/chromosome.py b/EasyGA/structure/chromosome.py
index bed2c49..7806821 100644
--- a/EasyGA/structure/chromosome.py
+++ b/EasyGA/structure/chromosome.py
@@ -107,6 +107,17 @@ class Chromosome():
         return (to_gene(gene) in self.gene_list)
 
 
+    def __hash__(self):
+        """
+        Returns hash(self).
+        Allows the user to use
+                {chromosome}
+                {chromosome: x}
+        or any other thing requiring hashes with chromosomes.
+        """
+        return hash(tuple(self))
+
+
     def __eq__(self, chromosome):
         """Returns self == chromosome, True if all genes match."""
         return self.gene_list == chromosome.gene_list
diff --git a/EasyGA/structure/population.py b/EasyGA/structure/population.py
index 5369ca4..abb2822 100644
--- a/EasyGA/structure/population.py
+++ b/EasyGA/structure/population.py
@@ -159,6 +159,17 @@ class Population:
         return (to_chromosome(chromosome) in self.chromosome_list)
 
 
+    def __hash__(self):
+        """
+        Returns hash(self).
+        Allows the user to use
+                {population}
+                {population: x}
+        or any other thing requiring hashes with populations.
+        """
+        return hash(tuple(self))
+
+
     def __eq__(self, population):
         """Returns self == population, True if all chromosomes match."""
         return self.chromosome_list == population.chromosome_list